Nah, my keyboard is sitting on top of a computer case, and the mouse is on a stack of old textbooks, so they're pretty far apart.
Pretty cool though. I never thaught of using my right thumb that much. All the better to learn lefthanded Dvorak, tohaugh. You can remap the -+ and Enter keys to all sorts of useful things to press while mousing.
I do need to lose this stupid ball mouse though and find that optical one.