Cooler Master HAF Stacker 935 Chassis Review @ OCIA.net
 

"Not since Shawn reviewed the Mountain Mods U2-UFO Duality have I seen a case specifically designed to house two individual computer systems. There are several reasons a hardcore computer enthusiast may have for needing room above and beyond what even your typical full tower case provides, but not many options are available without building your own... until now. Earlier this fall, Cooler Master revealed plans for a customizable, modular case system combining the cooling capabilities of the High Air-Flow series with the discontinued Stacker name, the HAF Stacker."

http://www.ocia.net/reviews/cmstack935/page1.shtml