Rich: Glad to hear you found something. Pain at any age is no fun and the enemy of an active lifestyle.

Down the road, you may want to check out a product called Acuknee. It's basically electronic stimulation of acupressure/acupuncture points, specifically designed to alleviate knee pain from a variety of conditions. Although I can't say if it's right for your tendonitis, I suspect it might be. It's available over the counter, but often prescribed. The Amazon reviews are pretty good.

Full disclosure: the inventor, a Utah doctor, is a long time friend and I've known about the product since its beta phase. When I broke my femur last year, I used one of the units without the knee cuff to keep my quads firing, and I give it some of the credit for a quick and complete recovery.