Started off with a 100 hash card. now with 4x5830's.  For all of the great designs and setups that I have seen here, I am going to give you something quite opposite. This is in my basement with 2 5830's plugged in traditionally and then ribbon cables with another 2 5830's just laying ontop of the other cards with a small fan overtop. 

http://img.photobucket.com/albums/v198/topslop1/2011-08-18_14-12-39_605.jpg