I can't even keep track of them all anymore. I have... lemme count in my head... 4 at my house, 2 at my sister's place, and another one at my dad's place.
I don't like laptops, so I just build computers to leave at my relatives houses, in case I need one when I visit.
My gaming rig is an AMB 64... I forget the speed, 3400 or 3600, something like that. Geforce 6800 for video, 2G RAM, SATA raid setup for hard drives, DVD reader, DVD burner, Klipsch THX speakers, Dual monitors both running 1600x1200, M$ Natural keyboard, Logitech G7 gaming mouse, M$ input controller for the left hand (forget the name, they don't make it anymore, made for RTS games), Logitech force feedback wheel and pedals, CH Products F16 fighterstick & throttle for jet sims... that's what I can recall off the top of my head.
I've also got machines for web servers, a control unit for my TV in the living room, and I'm working out the plans for my PC in the car with wireless high speed internet and a touch screen control where the stereo usually is.