I swear, I'm never going to get out of this thread.
Ryan...I have the "whole arm falling asleep" thing, too, but my neurologist wanted an MRI of my *neck,* not my hands. He did a nerve conduction study on the hands and put me in industrial, SWAT team looking black wrist braces that I sleep in. Those helped. (I learned the hard way not to do the "wake up and rub your eyes" thing. Ouch.) Apparently, I was holding my hands in a funny position when I slept that was causing problems.
I feel as if I have reached a rare level of incompetance by sleeping "wrong."