A post so nice he made it twice!

Bobby,
What kind of hand problems are you having? Is it the vibration or muscle/tendon problems? If it's vibration, something that helps a lot, in addition to gel grips, is using bar-end weights or bar-end mirrors. The added weight on the ends of the handlebars dampens the vibrations significantly.
I have tendonitis in my hands and forearms, so gripping the throttle to twist it is my main problem. I started using a throttle-rocker, and it made all the difference. It clamps around the throttle grip and has a plastic piece that the bottom of your palm rests on. That way you don't have to squeeze the grip, you just push down with your wrist to open the throttle.