Tweleted: Recover accidentally deleted Twitter messages; Find the tweets you've lost!

Tweleted allows you to recover Twitter messages — tweets — after they’ve been deleted.
Tweleted cannot tell the difference between tweets that have been deleted and those vanished temporarily through Twitter database problems.

How is this possible?
Deleting a message from Twitter itself doesn't delete it from other sites, including search.twitter.com. Tweleted works by automatically comparing the results from the main Twitter API with those from search.twitter.com; anything that appears in the latter but not in the former is likely to have been deleted!