Just built it tonight. Took me awhile, I wanted to make sure the motherboard worked before I went any further. The specs are as follows:
AMD Phenom 9950 2.6GHZ
4 GB DDR2 667
500GB Harddrive
DVD-RW DL with Lightscribe
2 4870 ATI Graphics cards in Crossfire
X-FI Fatality
Coolermaster RC690
And my 24" Acer monitor to go along with all that. It still has a few gremlins to work out but I should be ready for COD4 this weekend. That is if anyone is up for it. Should run COD4 nicely. Reason I didn't go for a X2 4870 was I just thought to get that because ATI will most likely be revealing the 5 series probably by Christmas. That and the insane power requirements.