I will have Vista installed and up and running tomorrow afternoon (school until then, bleh).
If I can get FRAPS to run (crosses fingers) I will report on Oblivion performance and BF2 with screenshots, and whatever else I have time to get loaded all based on a Core Duo 32-bit 1.83 ghz, 256 MB Mobility X1600, 5400 RPM 100 gig HD, and 1.5 gigs of DDR 667 RAM, basically a decent "mid-range" system (the S96J in my sig).
Also, I may get around to having time to let you photo nerds know how a Canon 10D RAW file processes in Photoshop CS2, and if Premiere Pro 2 runs I'll also try to get some estimates for you guys on how well Vista runs digital video editing. (may not have time for those last two this week though)
Also, I'm pretty sure most of us use the same software on our PCs, Firefox 2, MS Office, Adobe Reader 8, iTunes 7.x.x, Windows Media 11, WinRar, and a few others. Will report any issues with the average users software as well.