I built an AM3 rig yesterday w/ the Asus M4A79T Delux Board. It went well enough, but note the following:
1. There are only 3 SATA connections on this MB. I used them all with 2 HDs and 1 SATA optical drive. I would have liked more.
2. If your gonna install a 32 bit OS, your limited on RAM to ~3. 64 bit os will run more.
My Build -
ANTEC 750w PS and 900 and 2 case.
Phenom IIx4 955
BFG GeForce GTX MaxCore 55 Vid PCI Exp. 2
1 WD 360 MB 7200 rpm HD
1 Hitachi 1T 7200 RPM HD
6 mb OCZ Low Voltage HP DDR3 Ram (3x2 mb Sticks)
2 mb of bad ram caused an initial boot issue - but went away when I identified the bad stick.