Microsoft has just recently released the latest updates to the SharePoint SDK's.  If you are a SharePoint Developer, this is important for you, because there are usually changes/updates in the API documentation and occasionally new Samples.

Here are the downloads:

 

 Here's the description of the "Updated" WSS 3.0 SDK:

The Windows SharePoint Services 3.0 SDK contains conceptual overviews, programming tasks, and references to guide you in developing solutions based on Windows SharePoint Services as a platform. The SDK includes information about the following technologies:

  • Web Part Framework   Create, package, and deploy Web Parts on SharePoint sites.
  • Server-side object model   Work with individual lists and sites or manage an entire Windows SharePoint Services deployment.
  • Web services   Use default Web services, or create custom Web services, to interact with Windows SharePoint Services from external applications.
  • Collaborative Application Markup Language (CAML)   Customize the schemas that define lists and sites, define queries for use with members of the object model or Web services, and specify parameters for use with methods in Remote Procedure Call (RPC) protocol.
  • Master Pages   Specify all of the shared elements of your site in the master page or pages, and add content page-specific elements to content pages.
  • Workflows   Create workflows that encapsulate business processes to be performed on items in Windows SharePoint Services, and attach those workflows to items in Windows SharePoint Services.
  • Custom Field Types   Create custom field types that conform to your business data. These custom field types can be based on the base field types already included in Windows SharePoint Services, and can include custom data validation, field rendering, and field property rendering and processing.
  • Information Rights Management (IRM)   Specify IRM for files located in document libraries and stored as attachments to list items. Create IRM protectors for your own custom file types.
  • Document Property Promotion and Demotion   Use the built-in XML parser to synchronize the document properties and list column data for XML documents. Create document parsers to do the same for your custom file types.
  • Search   Use the new Query object model and Query Web service to retrieve search results. Search in Windows SharePoint Services now shares the same SharePoint search technology used by Microsoft Office SharePoint Server 2007.

Here's the description of the "Updated" SharePoint SDK:

The Microsoft Office SharePoint Server (MOSS) 2007 SDK is designed for solution providers, independent software vendors, value-added resellers, and other developers to learn about the new Office SharePoint Server 2007 enterprise application and platform. It features conceptual and "How to" articles, sample code, and programming references.
What’s New in this Release for the MOSS SDK

  • Installation enhancements: You now have a choice of installation path when you’re installing the SDK. Browse to your preferred folder during setup. The default installation path for the MOSS SDK is <%Program Files%>\2007 Office System Developer Resources\.
  • Start menu navigation: This release features a new Start menu shortcut for quick access to documentation (compiled HTML Help, or CHM for short) files and the Welcome Guide (ReadMe.htm), which is a landing page with links to all the tools and samples. In Windows Server 2003, click Start, Programs, 2007 Microsoft Office System Developer Resources, Office SharePoint Server 2007 SDK to open: MOSS 2007 Technical Articles and Visual How-Tos, Office Forms Server SDK Documentation, Office SharePoint Server SDK Documentation, Welcome Guide, Windows SharePoint Services SDK Documentation. In Windows Vista, click the Windows Vista Start button, All Programs, 2007 Microsoft Office System Developer Resources, Office SharePoint Server 2007 SDK to open: MOSS 2007 Technical Articles and Visual How-Tos, Office Forms Server SDK Documentation, Office SharePoint Server SDK Documentation, Welcome Guide, Windows SharePoint Services SDK Documentation.
  • Offline experience improvements: All of the technical articles, visual how-to articles, and book excerpts are now packaged—plus the Excel Services and Excel 2007 Windows Compute Cluster Server 2003 Job Submission Developer Guide—into one searchable CHM file. Browse offline for content published on MSDN out-of-band with the SDK. (Known issue: Several links in the MOSSSDK_TechArticles.chm and WSSSDK_TechArticles.chm do not work in a strictly offline scenario. Also, WMV file screencasts or downloads associated with articles are not packaged in the CHM, to keep the download size manageable. Workaround: Browse to the content on MSDN online; for ease-of-use, the CHM file TOC is the same as the MSDN Library TOC.
  • New tools and samples included with the MOSS SDK: Developer tools and samples for the following areas of MOSS development (new items in bold):
    • Business Data Catalog Samples and Utilities
      • Microsoft Business Data Catalog Definition Editor
      • Sample Pluggable SSO Provider
      • WSHelloWorld Web Service
      • WSOrders Web Service
      • Excel Services User Defined Function Sample
      • WSOrders Custom Proxy Sample
      • Amazon Web Service Sample
      • AdventureWorks Metadata Samples
      • SAP Sample
    • Document Management and Content Processing Samples
      • Comment Scrub Document Converter
      • Term Replacement Document Inspector
    • Search Samples
      • Sample Protocol Handler
      • Custom Content Source
    • Records Management and Policy Samples
      • De-Duplication Router
      • Document Integrity Verifier
      • Records Center Web Service Console Application
      • Search, Collect, and Hold Tool
      • Sample Custom Barcode Generator
      • IRM Document Protector
    • Workflow Samples
      • Custom Workflow Report Query Generator
      • Custom Workflow Report XLSX Injector
      • Visual Studio Workflow Templates
      • Enterprise Content Management Workflow Activities
      • List Item Activities
      • Hello World Sequential Workflow
      • State Based Approval Workflow
      • Modification Workflow
      • Replication and Contact Selector Workflow
      • Intersystem Purchase Order
      • Confidential Approval Workflow
      • Group Approval Workflow
      • Approval Workflow Sample
      • Multi-Stage Workflow
      • Server-side Collect Signatures Workflow
Full details can be found in the Welcome Guide of the SDK, accessible through the Start menu or button.
The download file OfficeServerSDK.exe provided for the SharePoint Server 2007 SDK contains the following:
  • Compiled HTML Help files (updated with new content since RTM), OSSSDK2007.chm and WSS3sdk.chm, which contain conceptual topics, Class Library and Web Service References for SharePoint Server 2007 and Microsoft Windows SharePoint Services 3.0.
    Updates to the MOSS SDK conceptual topics include:
    • How to: Customize RSS for the Content Query Web Part (new)
    • How to: Create a Minimal Master Page (revised)
    • Provisioning Portal Sites (revised)
    • Portal Site Template File (revised)
    • Portal (Portal Site Template) (revised)
    • Webs (Portal Site Template) (revised)
    • Web (Portal Site Template) (revised)
    Updates to the MOSS SDK Class Library and Web Service Reference include:
    • Microsoft.Office.Workflow.ISoapServerWorkflow
    • Microsoft.Office.Workflow.IWorkflow
    • Microsoft.Office.Workflow.Workflow
    • Microsoft.Office.RecordsManagement.PolicyFeatures.IBarCodeGenerator
    • Microsoft.Office.RecordsManagement.InformationPolicy.IPolicyFeatures
    • Workflow Web service
  • Code samples that relate to topics in the SDK: Business Data Catalog metadata samples, Custom Single Sign-On Provider, SampleWebService, and Custom Filter Web Parts. The sample projects use Microsoft Visual C# and Microsoft Visual Studio 2005.
    Updates to the MOSS SDK code samples include:
    • Microsoft Business Data Catalog Definition Editor tool
    • Protocol Handler Sample
  • Enterprise Content Management Starter Kit.

Also included in the SharePoint Server 2007 SDK, the Enterprise Content Management (ECM) Starter Kit
Designed for solution providers, independent software vendors, value-added resellers, and other developers to learn about how to extend the new ECM features and platform in Office SharePoint Server 2007. It contains the following:
White Papers
  • 2007 Office System Digital Signatures Developers Guide
  • 2007 Office System Encryption Developers Guide
  • Information Rights Management - Pluggable Rights Management, Technical Overview
  • Importing Custom Actions into SharePoint Designer
  • Workflow Security Topics

Code Samples
  • Content Processing
    • Term Replacement Document Inspector Module
    • Document Converters (server-side custom property remover, docm-to-docx converter)
  • Records Management and Policy
    • De-Duplication Router
    • Document Integrity Verifier
    • Records Repository Web Service Console Application
    • Search, Collect, and Hold Tool
    • Default Site Policy
  • Workflow
    Note: The following workflow samples are meant to demonstrate concepts and provide a starting point for extension. They are not the same workflows that are included with Office SharePoint Server 2007.
    • Custom Reports
    • ECM Activities
    • List Item Activities
    • Hello World Sequential Workflow
    • State Based Approval Workflow
    • Modification Workflow
    • Replication and Contact Selector Workflow
    • Intersystem Purchase Order
    • Confidential Approval
    • Group Approval
    • Review Workflows
    • Collect Feedback Workflow
    • Multi-Stage Workflow
    • Server-side Collect Signatures Workflow

Visual Studio Project Templates for SharePoint Server 2007 workflow
  • SharePoint Server Sequential Workflow Library
  • SharePoint Server State Machine Workflow Library

 

Enjoy,

~ Robert Shelton