I happened to look again (after not having signed-on to kneegeeks in a few years) to see where this thread has gone, and it has certainly persisted. Perhaps this should be in the 'success stories' thread.
I started this subject three years ago, and though things haven't improved, knee-wise, they haven't gotten worse either. I've still been able to run regularly once or twice a week. I'm happy to see lots of people lumbering along despite obstacles.
For me, while it irritates the knees and it sometimes makes them a bit stiff afterwards, it just doesn't feel like it is making it progressively worse, and in the meantime, it is doing a lot of positive things.