I've got a testbed system I need one final touch on and then I'll be installing the Vista beta and Office 2007 beta for testing. It's nothing compared to my primary box, but it should be a good test for what the average user can expect. I'd rather get the idea of what their experience will be so I can tell non-techie people what I think of it.
Specs: eMachines T2885 tower (don't laugh, I got it for free, well, after replacing the PSU and mainboard), Celeron 2.8GHz, 512MB RAM, Seagate 7200.7 120GB hard disk, DVD-ROM & CD-RW.
Unfortunately, it's PCI only, but I found a really cheap used BFG GeforceFX 5500OC 256MB PCI card, which should be here Monday or Tuesday, so I'll be able to test Aero Glass (I'm quite sure the onboard Intel 845 video would choke trying). I'm already 60% done with the download (I love my 8Mbps down/768k up connection), and I'm quite interested to see what Microsoft has to offer this time.
Intel Q9450 @3.2GHz, Gigabyte GA EP45-UD3P, 4 x 2GB G.Skill @4-4-4-12
Antec P160SW case (modded), Xigmatek 750w PSU
3x 500GB (RAID-5), , OptiArc 7200S, ASUS E818A3T
Creative X-Fi XtremeGamer, Hauppauge HVR-1800, Radeon 4890