Re:Fixed mine within 1 week. (Score 2, Informative)

Yep. The Vertical Mouse is wonderful. I'd also recommend one of these: http://www.kinesis-ergo.com/contoured.htm. It's also very important to make sure they're at the right height. Having your keyboard/mouse too high (as most desks are) leads to wrist problems fast. For me, this meant buying a good office chair and then building a desk (I wanted a really odd shape, too) with an adjustable keyboard tray (I got mine from www.humanscale.com, but there are cheaper options available).

That whole process knocked out my problems in about a month (a month of heavy coding, even). It ain't cheap, but it's cheaper than surgery. --0x4a6d74