i'm going way out on a limb here and recommending a wacom Graphire2 tablet. it comes with a 2 button scroll wheel mouse and a pen that functions as a mouse. using the pen practically eliminates carpel tunnel. switching back and forth helps the wrist ALOT. and you will be set for ink in jaguar. i admit, it's a bit procey for a 'mouse', but that's just it, it's a great mouse and so much more. in fact, when i bought mine, i didn't even realize it functions as a mouse. But i have long since ditched my original mouse and can't imagine being without it.
i'm really looking forward to ink!!