I found a link to "Visual Studio 2008 and .NET Framework 3.5 Training Kit" from the Microsoft web site, and what do you know, it requires Vista to run it.
That's one way to get the Vista ball rolling. I am still on XP and probably will be for a long time.
http://www.microsoft.com/downloads/details.aspx?FamilyID=8bdaa836-0bba-4393-94db-6c3c4a0c98a1&DisplayLang=en Matt, out of curiosity, did you try to download it and run it anyway?
I'm running Win Server, and was able to pull it down and install it. Now, I only went through a small amount of the content, so I can't tell for sure, but you might want to give it a try.
Kevin