When I still had a functional HP660LX, I have to admit... my fingers would cramp after a few minutes of typing. However, with the seemingly larger keyboard of the J720, I haven't had much trouble with repetitive motion injuries. Then again, I don't use it often enough or long enough. Still, I have used it for periods much longer than I ever did with my 660LX and without pain.
That is not the case for our Blackberry brothers
(or are they cousins?
):
http://apnews.excite.com/article/20051021/D8DC4N8O0.html
