to add to this, I can't seem to find a way to deauthorize a computer remotely. What if I'd given my PowerBook to someone prior to doing this? I just hit one of my DRM limits through ignorance with no wrong doing.
- Select Store -> View My Account
- The resulting panel will state the number of systems currently authorized to play music purchased with your account, and you have the option of deauthorizing all of them from there.
I thought at one time you could deauthorize specific system from there -- so right now it is possible, albeit a bit of a PITA to deauthorize everything, and then reauthorize the systems you want available. However, as from the server-side it may require generating a new key for your account (as opposed to just deleting the key from the client if you deauthorize from the Store menu), this may not be technically possible under the current encryption key management system.