google “itunes 7 missing files” and you can read all about this wonderful feature in itunes. (I recently lost 2 purchased TV show episodes).
The following report is an illustration of what not to do if you don’t want your purchased media to suddenly vanish.
1. I was downloading Battlestar galactica from itunes
2. [...]

First notified of this exciting news by Nate, Bally’s total fitness is not doing so well it turns out. This really brings tears to our eyes, as we used used to be customers of theirs back in the day. Customers who could not end or suspend contracts with the said company [...]