Try to keep them so they dont heavily distort the page guys, makes it alot harder to view other peoples. Im doing in now and ill come back and edit mine in here.
I simply took a screen shot and got this. (Looks like the side monitors are aligned pretty well for continuity of the background image...Yay, me!)
Middle one is main from my laptop and the others are LCDs. I only have this at work, though.
Most of the time it is the middle only, like when I play DoD:S...at home.