I’m just pulling together next Wednesday MSDN Flash newsletter and came across this gem. The last 12 months of releases from the Patterns and Practices team:

• Enterprise Library v4.1 is a collection of reusable software components that help developers with common development needs such as logging, validation, data access, and exception handling. They can be used “as is” or extended or modified by developers as needed.
• Unity Application Block v1.2 is a lightweight extensible dependency injection container with support for constructor, property, and method call injection. It addresses the issues faced by developers engaged in component-based software engineering.
• Composite Application Guidance for WPF (“PRISM”) v1.0 and v2.0 helps developers build and evolve modular Windows Presentation Foundation and Silverlight client applications. These applications typically include  multiple screens and role-determined behavior and are designed to change over time based on business requirements.
• Application Architecture Guide v2.0 provides design-level guidance for the architecture and design of applications built on the .NET Framework. It focuses on the most common types of applications, partitioning application functionality into layers, components, and services, and walks through their key design characteristics.
• ESB v2.0 helps developers leverage the Microsoft BizTalk Server platform to build a custom enterprise service bus (ESB) for their SOA implementations.
• SharePoint Development Guidance helps customers accelerate the construction of advanced applications. This guidance helps architects and developers in the following areas: Use SharePoint capabilities to make more powerful applications; Build applications that are easier to scale, maintain and extend; Improve application quality through testing; Improve and accelerate team productivity;
• Acceptance Testing Guide v1.0 (Beta 2) provides guidance on 1. How to Plan for Acceptance Testing;2. What Kinds of Acceptance Tests to Run; 3. How to Create and Run Acceptance Tests; 4. Defining What “Done” Means; and 5.How to Justify Your Approach;
• p&p Agile Showcase on MSDN patterns & practices has been using agile development techniques for the past five years. Customers and community asked us to share our experiences and learning. This page lists resources that we've used to make our teams more successful.