A real problem for many users is Blackberry thumb the equivalent perhaps of carpal tunnel syndrome for those of us using mobile devices extensively. I know people who write long articles on handheld devices so the fact that this problem is becoming more popular should be considered a warning sign to the millions of users who depend on mobile devices for every-day work. An external keyboard may be a solution to this problem or even a sub-notebook that is easy to carry. The thumb is the least dexterous of all the digits and apparently according to this article is not meant to be worked out.