In our house.
Home Built Athlon 64, 1 GB DDR RAM, 250 GB HDD, 21" Cornerstone monitor, and WinXP Professional. Built about 4 years ago.
Medion Laptop. Intel P4, 1280 MB DDR RAM, 15.1" screen, 120 GB HDD, and WinXP Home. About 5 years old. Still running great.
Compaq Presario (cheapie) with an AMD Athlon 64, 1 GB DDR RAM, 250 GB HDD, Win XP Home. (eBay PC for inventory control)
Homebuilt AMD Athlon XP 1800. 2 GB RAM, Windows XP Professional, 90 GB RAID (stripe) drives. Currently in storage. Going to get a about 1 TB Storage (RAID Mirror) for all the media we have on our PC's. (movies, pictures, music, etc.)
We plan on building a media PC to use as a video streamer when we get a house with room for a home theatre. That computer would be great as a network server.
Complete home network, including a Okidata Color Laser printer connected to all PC's via a TCP/IP connectin. (Print server)
If you are in the market for a new printer, go laser. Forget about inkjet printers. They suck.
Tom