The computer I built last August:

CPU: Intel Q6600
RAM: 4 x 1GB DDR2 800
Motherboard: Gigabyte P35
Video Card: ATI X1950XT
Hard Drives: Western Digital 250GB & two Seagate 320GBs
PSU: Corsair 520W
Case: Lian Li v1000
Monitor: Dell 24" LCD
Keyboard: Logitech G11
Mouse: Logitech MX Revolution
Wacom Intuos 6x11 tablet
Some really old temporary speakers that I hope to soon replace

Also have an IBM Thinkpad x61 tablet laptop.
CPU: Core 2 Duo 1.6 low voltage
RAM: 1GB
Hard Drive 80GB/5400RPM
At some point I plan on swapping in 2GB of RAM and maybe even the 80GB/7200RPM hard drive from my old dead laptop, but I haven't gotten around to it yet and in the meantime the computer is quick enough for the things I do with it.

Wow, you all have some nice computers.

Here's mine, although it's getting pretty old...
HP ZD8000 Laptop
3.2 Ghz
512MB of RAM
60 GB Hard Drive
ATI Radeon X600 256MB
17" screen size

Currently planning on upgrading to 2GB RAM and a 100GB Hard Drive. (I'd get more space, but that's the largest size available at 7200RPM for a laptop and I have various portable hard drives sitting around.)