Though not a voice user yet (I'm just a lurker on this list), I really love Hunter Digital's No Hands Mouse. Because my RSI seems to be neck/shoulder-oriented (oddly, my right wrist starts hurting when I use my left hand for mousing), the No Hands Mouse has been a great help in reducing pain. I also try to maximize the things I do with the mouse (which is quite possible on Linux/Unix & X-Windows) which means minimizing keyboard and therefore hand use. Just thought I'd share my lone positive thoughts about this great device.