For the server side you don't need AGP video power, so it's basically nonexistant right now. Wait for some more enthuiast boards from makes such as Asus, Abit, MSI, etc. to throw some big players into the field before making a big purchasing decision.
If you absolutely don't need SMP you could also get an Athlon 64 FX board with an AGP 8x slot.
-Por