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Thank you. It already works for any hashtags or usernames that it encounters, here's #sundaybaconclub http://tagwalk.com/tag/sundaybaconclub
I'm impressed. From what I've read on your blog, you have gathered a massive amount of data. How do you fight spam?
In my experience, I have found Tweet source (web, Tweetdeck, API etc.) to be one of the most effective quality/authenticity indicators.