I just got a Korg Nanopad for drum programming <http://www.korg.com/nanoseries> and it has am x/y pad that can be manipulated with one's finger to alter continuous controller data. Has anybody tried this, and if so, how you likin' it? I have an M-audio radium 61 keyboard, and i don't care for the mod wheel for programming dynamics with the garritan collections. The other option, perhaps, is to use an old video game joystick.
I have one and have also tried it for that purpose. It works pretty well, except there's a small curve learning to associate translational movement with volume instead of pressure. Personally, I've found I prefer the modwheel for influencing dynamics. If you have any sort of library with volume control it also excels in that area.