Microsoft has several trial downloads that can be very helpful as we transition to SharePoint 2010 development...

General Developer Downloads:

• Visual Studio 2010 Ultimate Beta 2 (SharePoint Tools hardcoded to the SharePoint 2010 Beta 2 release coming later in November)
• Team Foundation Server (TFS) 2010 Beta 2
• Visual Studio Team Explorer 2010 Beta 2
• 90-day Windows 7 Install bits 
• 90-day Windows 7 VHD
• Getting Started Developing on SharePoint 2010
• SharePoint 2010 Technical Articles
• SharePoint 2010 Developer Center
• SharePoint 2010 Walkthroughs

Still tons of helpful downloads for Windows SharePoint Services 3.0 development too...

• Team Foundation Server 2008 Trial
• Visual Studio 2008 Team Suite Trial
• Virtual Hard Disk – Test Drive Program
• Windows Server 2008 Enterprise Edition x86 VHD
• Office SharePoint Server 2007 for Windows Server 2003 R2 VHD
• SharePoint Server 2007 Trial (x86)
• SharePoint Server 2007 Trial (x64)
• Windows SharePoint Services 3.0 with SP2
• Windows SharePoint Services 3.0 SDK
• SharePoint Server 2007 SDK
• Fabulous Forty Site Templates
• Visual Studio 2008 extensions for SharePoint, v1.3 (still in CTP)
• SharePoint Developer Guidance from Patterns and Practices
• Windows SharePoint Services 3.0 Technical Articles and Visual How Tos
• SharePoint Server 2007 Technical Articles and Visual How Tos

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