I am interested in mobos that can handle up to eight processors, either eight single-core or more desirably four dual-core processors. The intent is to build a parallel computer in a single box. Mobos that I can find which handle multiple processors seem to be optimized for server applications, while my goal is a single user workstation capable of handling Grand Challenge-type computations. Anyone know of suitable off-the-shelf hardware for building such a computer? And the software to run it?