Desktop (custom):AMD64 3000+
MSI KV-480 mobo (not sure on that -- it is MSI though)
2GB PC3200 DDR
X800GTO PCI-e 256MB GDDR3 video card
4x DVD-RW
160GB PATA -- applications/OS
120GB PATA -- storage
Hardware EAX 3D sound w/ surround speakers
Windowed MiniATX case w/ 550W PSU
19" Proview LCD (1280x1024)
Runs Windows Media Center
Laptop (Inspiron E1705):Intel Core Duo 1.83GHz
1GB PC4200 DDR2
6x DVD+RW
Bluetooth / IrDA / Firewire / USB 2.0 / SD memory
Intel 945GM Graphics
17" WXGA display (1920x1200)
Runs Ubuntu/GNU Linux
Fileserver (custom): -- MIA right now

AMD Duron 1.6GHz
128MB PC2100 DDR
Standalone ATA-100 controller
4x 320GB PATA drives in RAID-5 (906GB usable)
12x 40mm intake cooling fans
3x 80mm exhaust fans
Sparkle 250W PSU
Runs Debian/GNU Linux
Development machine (Poweredge 1400SC):Dual PIII 933MHz
2GB ECC PC-133
Hardware SCSI-160 RAID-1 (2x 9GB)
3x DVD-ROMs (I have more DVD-ROM drives than I have spare faceplates ...)
Runs SuSE/Novell Linux
Media machine (Dell Optiplex):PIII 1.1GHz
256MB PC-133
SB Live! 5.1 Dolby surround card
Radeon 9250SE w/ component out video
16x DVD-ROM drive
Runs Gentoo/GNU Linux and MythTV
There's a few random other ones ... like the print server / router that aren't really worth mentioning because of how little they do (or aren't built yet).