To all approvers: just to bring it up again, what are your opinions on "snooze" or "pin" button, which would allow to temporarily hide or to hold the post at the beginning of mod queue, respectively? It is sort like favgroups, so it could be integrated with them; then again, it's somewhat different, and it depends on whether at all and how it will be used - perhaps, something else should be implemented.
Albert suggests to implement it via a button to temporarily disapprove post ("no interest"), and automatically remove disapproval after X hours, moving post back to the queue. I propose integrating with favgroups, so that the button would mark "no interest" and move post to favgroup named "watchlist". The problem I see with first approach is that post may fall off the queue before it reappears/before approver sees it. The problem with second one is that it requires more convenient way to remove posts from watchlist, and also that "watchlist" favgroup would count against favgroup limit, possibly leading to errors if a user already has 10 favgroups.