So far I am loving spaces, it really does help keep me easily organized between Mail, Safari, iTunes, iChat (the programs I am using most right now), and then anything else I need. When I return to school next week, I can see this being invaluable because I usually have complaints, other case documents, and articles to download and read, notes from classes to type/review, and outlines of my classes to create from combining all of my class materials together. Thank you Apple!
I think I am just going to keep Spaces and not even download Virtuedesktop to try. Interesting that people seem split between the two.