Also, just to follow up on something Jim said -- currently, you cannot delete a restoration item from the download queue as you can with a regular download. This is because some movies may have multiple different "media objects" (files), which could conceivably reside on different drives in the Terra. For example, some movies include the extra features in a separate download.
Let's imagine a scenario: you download the HD version of Lord of the Rings: Fellowship of the Ring (Extended Edition). This is an uncommon case, but for some really long movies like this one, the feature is actually split across two files. So imagine that part 1 of the movie goes on drive 1 in your Terra, and part 2 of the movie goes on drive 3. Later, drive 3 fails. If we allowed you to cancel that restoration, you would have a situation in which the movie would still show on your system, and you could start playing it, but at the mid-point of the movie... oops. No more movie.
So, if there's a restoration in your queue and you decide that you don't want to restore that movie after all, the way to address that for the time being is to go to your system and delete the movie. That deletion is reported to the headend, and the restoration of that title will be canceled.
In the future, we aim to make this more streamlined, but since we expected that most people will want to restore their missing content most of the time, for this first release, we focused on that common case.