The Microsoft patterns & practices Windows Azure Architecture Guide - Part I is now available on MSDN. 

This guide focuses on a migration scenario.  It walks through migrating a custom expense tracking and reimbursement system to the cloud.

Chapters

• Introduction to the Windows Azure Platform
• The Adatum Scenario
• Phase 1: Getting to the Cloud
• How Much Will It Cost
• Phase 2: Automating Deployment and Using Windows Azure Storage
• Phase 3: Uploading Images and Adding a Worker Role
• Application Life Cycle Management for Windows Azure Applications
• Phase 4: Adding More Tasks and Tuning the Application

Key Topics

• Asynchronous processing, blobs, and shared access signatures
• Authentication and authorization
• Automating deployment and managing environments
• Background processing and performance considerations
• Data access
• Development life cycle
• Pricing and cost considerations
• Session management
• Terminology and components
• Using Windows Azure table storage

Key Links

• Windows Azure Architecture Guide - Part 1 (MSDN)
• Windows Azure Project Site (CodePlex)
• Download Windows Azure code samples