My wife told me she saw a piece on this on the local news last night as well. Never occurred to me before, but it makes perfect sense that the use of PDA type devices might have the same sort of keyboard related injury risk that frequent laptop and PC users suffer.
The thing that I appreciate about this article is that it states the issue in a factual way and offers some sound advice on how to mitigate injury risk...it was refreshing to not see hysterical "Blackberrys are Crippling America" jargon.
1st Step in Troubleshooting: Do you have a BlackBerry Data Plan?
2nd Step in Troubleshooting: Pull the Battery.