This guy over at Madshrimps takes a slightly different approach to building a two-CPU system. Duallie? Nope. Dual-core? Nope. Heh. Crazy.

"Rather than strapping 2 CPU's to one motherboard or using one the latest Dual Core offerings from AMD/Intel he has been working on a case which can house 2 systems nicely, with good cooling and easy functionality through one keyboard/mouse and monitor."