As many folks know, .NET Framework 3.5 shipping a little later this year will include Service Pack 1 for .NET Framework 2.0 and 3.0 (these updates will also be available standalone in Windows Update).  A while ago, I posted about Visual Studio 2008 Multi-targeting.  I also wanted to let you know that Microsoft published the full list of new APIs in SP1..  See the details on Scott's blog.