Thanks for all the great responses guys and gals. The past few days have showed some improvement although I still can hear the knees cracking on occasion. I'm continuing to take time off, although the temptation to hop on the bike is great. However, I'm going to be smart about this and not give in and wreck any progress that has been made. I might hop on a stationary bike at the gym sometime next week and ride that for a half hour say and see what type of reaction I get. I've been taking Ibuprofin which my wife recommended. She's a nurse and thought that might help? Radio Free mentions glucosamine and chondroitin. This was also recommended to me by a fellow gym member. At the very least, it's worth a try. I have heard some good input on this supplement. The cadence is also something I'm paying alot more attention to now. In the past when riding uphills, I've tended to ride too hard going upwards which would again explain my present situation. I guess you live and learn.