Maarten van Stam has a nice tip for isolating specific changes made in SP1. Check out his post here, or just run this search and you’ll see the list of 902 pages worth of doco changes.
You can then narrow that further by selecting one of the one of the Refinement options:
Refining by Visual Studio Tools for Office and Visual Studio 2008 for example gives us 306 results:
Speaking of VSTO related stuff specifically, Christin Boyd has a rundown of the VSTO SP1 enhancements here.
Technorati Tags: Visual Studio 2008 SP1,VSTO
