The more products one has, the more holes there are. I'd say there is a hole between the AirHead/BitHead and the Micro Portable, but I'd also say there's a hole that could be filled with Desktop DACS; a few holes for tube amps; a hole for Desktop speaker stands and power amps (about to be filled); and then a few wild but not crazy holes like a desktop cd player or hard drive file player.
There's friggen holes everywhere!!!! Aaaaaaaaaaaa!!!! 
