The tweet is the query. From Ad Age, which penned a good piece on the promise of Twitter search:
In the future, searches won’t only query what’s being said at the moment, but will go out to the Twitter audience in the form of a question, like a faster and less-filtered Yahoo Answers or Wiki Answers. Users would be able to tap the collective knowledge of the 6 million or so members of the Twitterverse.
“You put a question out to the global mind, and it comes back,” Mr. Chaffee explained. “Millions of people are contributing to the knowledge base. The engine is alive. You get feedback in real time from people, not just documents.”