I have not spoken with or researched any problems with bones and joints, although I have tendonitis and will probably have this sort of trouble as I age. (Like, who doesn't?) But I just got a wonderful link in my mail and wanted to save it.
I just was talking with someone who has just recovered from a potentially paralyzing neck injury. He jut had a disc replacement in Germany (with great success) and suggests the artificial disc replacement support group, for information and support.