While it's always cool to see stuff like this... it would be overkill for me to multibox on a setup like this. I would never be able to pay attention to 5 (or 6) individual screens while multiboxing. Maybe I would be able to pay attention to all of the screens if I sat back far enough but... I don't know. I have been contemplating adding 2 more screens to my setup (for a total of 6) but, not for multiboxing.

Also, do you actually use the other mice and keyboards? If so, I would recommend Input Director to eliminate all of that.