Yeah, the Theracane is pretty good. My favorite gadget for forearm trouble is the ArmAid: http://armaid.com/ It's very good for kneading your forearm extensors and flexors. When my forearms get tight, a few sessions with this usually fixes it.
wow, I'm glad I posted, that looks to be very useful. Do you need the leg strap, or do you just balance it on your leg?
I never use the leg strap, personally, though I can imagine that, if your hands are in bad shape, it would reduce the force needed to hold it in place.
It's actually also really good for kneading your calves for people like me that have perpetual trigger points there. It's a bit undersized, so I've been meaning to email them and suggest they make a "LegAid" that's larger and more robust...
Also useful is a theracane. Lets you self-massage and apply trigger point therapy to your back and other hard to reach areas. Not too expensive either, only $40. It helped clear up a tight trapezius muscle which was causing a shoulder ache.
http://www.theracane.com/index.html
(this was recommended by the same therapist who helped my hand)