Here's a pretty picture, the successor to 4x4, which I just enjoyed looking at:
(note this is a reference board)
http://www.extremetech.com/slideshow_viewer/0,1205,l=207253&s=1598&a=207252&po=6,00.asp
(note this is a reference board)
http://www.extremetech.com/slideshow_viewer/0,1205,l=207253&s=1598&a=207252&po=6,00.asp