Yep, socket 939 does dual core and nForce3 chipset does AGP. Get a mobo with those 2 things and you'll be happy. Epox, DFI, MSI are some of the best brands currently, and Chaintech (I think - my memory's being flakey today) is decent if you're looking for cheap.
<font color=blue>Outside of a dog, a book is man's best friend. Inside the dog its too dark to read.
-- Groucho Marx</font color=blue>