A few quick links to learn more about WM6 for Developers:

• First, Laura Foy from on10.net interviews Derek Snyder from our developer team .
• Check this article on MSDN written by Jim Wilson on What's New for Developers in Windows Mobile 6.
• This MSDN article on What's New in .NET CF 2.0 is more technical and provides details at the API level
• Of course you should bookmark the .NET Compact Framework page and the Mobility Developer Center on MSDN
• Information on the new WIndows Mobile 6 SDK is found on this blog http://blogs.msdn.com/fzandona/ 
• The product page for SQL Server Compact Edition