Changes from Beta1 to Beta2 in VS 2005 Data Design-Time Features
If my post
that discusses the improvements for developing data forms in in VS2005 inspired you to check it out (or check it out again), then be sure to go through this post
by Steve Lasker the Microsoft PM who is responsible for most of these features. In his very extensive post, he discusses many of the changes from Beta1 to Beta2, as well as the reasoning / thought process that was behind the changes. Note that many of these changes have already shown up in the recent CTP releases.