While researching on 64-bit computing for an architecture briefing, I came across these very useful MSDN webcasts from Ryan Storgard's blog http://blogs.msdn.com/stoey/:

MSDN Webcast: Welcome to 64-Bit Windows Computing: Introduction, Architecture, Road Map, and 32-bit Application Compatibility (Level 100)

MSDN Webcast: Taking Application Development to the Next Level: Design and Development for 64-Bit Windows (Level 300)

MSDN Webcast: Managed Code on 64-Bit Windows Platforms (Level 300)

MSDN Webcast: Migrating Your Code to Run Natively on 64-Bit Windows: Insider Tips and Indispensable Tools (Level 300)

MSDN Webcast: Kernel Mode Drivers in Windows 64-Bit Systems: Migration and Development (Level 300)

MSDN Webcast: Going Native on 64-Bit Windows Platforms: Application Support and Migration from Existing Application Frameworks (Level 300)

MSDN Webcast: Going Native on 64-Bit Windows Platforms: Code Optimization Tools and Techniques (Level 300)

MSDN Webcast: Making the Most of Enterprise Hardware: SQL Server 2005 Data Transformation Services (Level 200)

MSDN Webcast: AMD64 Architecture Drilldown: 64-Bit Performance and 32-Bit Compatibility (Level 400)

MSDN Webcast: 64-Bit Computing with Intel Processors: Enabling the Future (Level 400)

MSDN Webcast: Terminal Services: Clear-Cut Benefits with Windows Server 2003 x64 (Level 300)

MSDN Webcast: Active Directory: Maximize Performance in Enterprise Deployments with Windows Server 2003 x64 (Level 300)

MSDN Webcast: Data Warehousing with SQL Server 2000 Enterprise Edition (64-Bit) (Level 300)

Hope these are useful.

- hanuk