My parts are as follows:
RAIDMAX SMILODON ATX-612WBP Black 1.0mm SECC Steel ATX Mid Tower Foldout MB Computer Case With 500W Power Supply
AMD Athlon II X2 250 Regor 3.0GHz
Seagate Barracuda 7200.12 ST3160318AS 160GB 7200 RPM SATA 3.0Gb/s 3.5"
Patriot Signature 1GB 240-Pin DDR2 SDRAM DDR2 667 (PC2 5300) Desktop Memory Model PSD21G6672
Ubuntu 8.04 (was going to use 10.04, but I had some issues saving it to the hard drive from the flash drive)
As for the screen, keyboard, etc. I had some old stuff from an old Gateway and a Dell Monitor that I got for free from a hospital that was updating. I wound up spending about $330 on it.
For the moment it's running well except when I try to run a few of the games I have on it, SuperTux 2 is the only one I can think of right off. Basically, it starts running really slowly and the colors get all wonky. I figure it's just that the integrated graphics aren't working well with those games (but if you think it might be something else, please let me know).
Well, that's basically it, good to meet all of you.