I heard a rumor that people use twitter like a search engine -- ask a question, get answers. Make a bot that records such questions, and their answers, and the

I heard a rumor that people use twitter like a search engine -- ask a question, get answers. Make a bot that records such questions, and their answers, and then make a search engine over the records. Expert Mode: discern between questions like Am I fat?? vs. What is a cheap but nice hotel in LA? -- although it maybe funny not to. Is there some kind of tweet stream you can process for this?? It seems like it would hammer the twitter infrastructure so it may not be coool.