Server - P4 3.8, 2GB DDR2, X800XT PE, Dual 160GB HDDs running Exchange 2003 and Windows 2003.
Ovislink WiFi around the house, and wired connections
Wired Gaming - XBOX and PS2 (with an AE700 bolted on for 10ft fun!)
Backup Box (Mirroring HEXUS and things) - P4 2.53, 1GB Ram, Dual 80GB Hard drives - running FreeBSD.
Office PC - Shuttle SB77G5, P4 3.6, 1GB Ram, X800Pro(AGP), Plextor DVD/CDRW, Gigabyte WiFi Module - Dell 24" Widescreen, and Iiyama 18".
Mac - Mini Mac - 1.42GHz, 512MB, Tiger, 80GB HDD, WiFi, BlueTooth, Superdrive - 19" Herc
Laptop - X31 - IBM thingy - roaming
Spare PC - Dual Opteron zmaxdp - 2GB ram - and trimmings.
Pinnacle Showcentre on the TV streaming DiVX and stuff via WiFi
M2000 Phone sync'd via WiFi for email and contacts on the move.
I have a Pentium-M 2.13GHz /w 6200 AGP, 120GB HDD, all in the cellar - but the stupid silverstone chassis won't do it properly - so that is just waiting to be beaten.
I would use my Slimp3 but I can't be bothered