After about 5 1/2 months of being without my own box, I finally fixed it. The specs are as follows.
AMD Athlon II X3 440 @ 3Ghz
Asus M4A88TD-V Evo
2x 2GB Kingston DDR3 1066
MSI GeForce 9600GT 512MB GDDR3 (old)
1x 160GB PATA (old)
1x BenQ 1640 DVD/CD Combo Drive (old)
2x 19" wide-screen @ 1440x900 (old)
Ubuntu 9.10 64bit (switching to Arch or Fedora soon, though)
Big upgrade from my last build, which took place in early summer 2008. Next thing to do, when the budget permits, is to get rid of the old PATA hard drive for a nice fat SATA, a new GPU, and a new PSU to power it all.
Overall I'm very happy with the machine. Paid all of $274ish for the CPU, mobo, and RAM.