So, where do you keep your mouse? Just normal old to the right of and in line with the keyboard? To the left? In front of? Something more eccentric and interesting?
With my edox I keep a cst trackball in the middle of the two halves, a vertical mouse (with a normal mouse off to the back for switchin it up) to the right, and a thumb trackball (slanted sideways so I can rest my arm across the table and use it) to the left and a bit in front. I mostly just use keyboard binds though, with a tiling wm and vimperator I don't touch the mouse much.
For someone who doesn't use the mouse often I have a lot of mice.