I have a Shuttle ST61G4 in the closet at my parents house. Still works, and it's rocking a 3.2GHz Northwood P4 (with HT!). Only qualm I have is that the onboard graphics on it might grow outdated - you know, what if Microsoft makes a new OS, oh, let's call it "Vista", and adds fancy visuals that this card can't handle?
HP 8200 Elite (MX100/12GB), HP 6530b (M500/4GB). Dell U3014, HP 2511x, HP L1740, HP LaserJet 4050, Pioneer SP-BS22-LR with Lepai amp (without SSDs). Corsair K70 (mx blue) and IBM Model M.
BIOS is a plant-based fuel, right?