Apple Needs to List Authorized Computers!
Why is it that Apple won't let you both see and control the machines that are authorized on your itunes account? If it's only the UUID that is being retained then there is no reason that can't let the account holder see and authorize, deauthorize each machine from a central web screen. It would make it simple for those who accidently don't deauthorize before selling or letting their computer go (or the computer breaking before it can be deauthorized) fix the problem without all the trial and error the current system has.