@answerme turns Twitter into a Q&A site. You go to atanswerme.com to see the questions, and you answer by entering @answerme @username this is an answer.
Here's how it works:
@answerme is a little tool to help you track questions you ask on Twitter. Imagine Yahoo! Answers lite built on Twitter and you've got a good idea of what we're doin' here.
Innovative uses of Twitter just keep coming. Just what I needed-- something to make me use Twitter even more. Follow @answerme.