It was discussed in
this thread, but I figured I'd make a new one with the prices and all of that:
eVGA 7800GT + mobo + Quake4: $355.69 + $4 shipping
Opteron 144 (64bit, 1.8GHz, 1MB L2 Cache): $149.99 + $8.07
Transparent case: $36.99 + $16 shipping
Thermalright Xp-90 Heatsink, Panaflo fan, and shipping: $40.95
SeaSonic S12-500 ATX12V 500W Power Supply: $124.99 + $6.99 - $25.00
Lite-On DVD Burner ~$40 (already have one)
2x512 (1GB Dual channel) OCZ PC3200, $55 AR
250GB Seagate: $129.99 + $7.99 + $9.66 - $60.00
Total: $901.31
What I actually paid: $501.62 (already had the burner and got the mobo/vid card for Christmas).