Yeah, I'm planning on building a LANParty Case...
I've got everything for it, except the mobo, lol
And I want to keep costs of mobo+ram around 140-150 bucks..
So, I was looking for something to support the CPU I bought today, a 3700 in socket 939, but it would also have to support my AGP8x 6800GS.. RAM is cheap, so DDR2 is a possiblity.
It's going to be hard to get unless you go with one of those two motherboards I linked above. The hardware has been discontinued which is not good news for you. Everything is now PCI-express, DDR2, and Socket AM2. DDR3 is top of the line right now (expensive) along with quad core CPU support and PCI-express 2.0.
But it doesn't support AGP graphics card. Are you sure you don't want to upgrade your video card instead? There are tons of Socket 939 supported motherboards that are microATX form factors with PCI-express slots. AGPs is the killer here because they're almost wiped off the face of the earth.