Is easy. Very easy in fact, upgrade isn’t much more difficult either! There is a fantastic video showing how to download and install the bits need to test VSTS 2010 beta 1 at the 10-4 home on msdn.com http://channel9.msdn.com/shows/10-4/10-4-Episode-20-Downloading-and-Installing-Visual-Studio-2010-Beta-1/
