5 in the house currently:

The new rig detailed in my Sig.

Sister's 700ish P3 Dell

Parents' 600ish Celeron from gateway

My linux box; 1.7 GHz Celeron, 256MB PC2700, 40 GB Maxtor, Cheap Shuttle Micro ATX board and an even cheaper CDROM.

My old Sony Vaio; 1.5 GHz Pentium 4 (423pin), 256MB PC800 Rambus, 80 GB Maxtor, some GF2MX video card.

Pieces of our first 200 Mhz Pentium 1 are hiding in my closet, except the pentium which hangs from my keys now