WhosTalkin? is a brand new web tool that’s a “social media search tool.” In other words, it specifically searches a ton of different sources like Twitter, Ning, Technorati, etc. to discover “conversations” that are going on about your topic of interest.
In my case, think it’ll be useful for professional development and research. For example, I typed in the name “Stephen Krashen” (the second language learning writer, practitioner, and theorist) and found many different results than what I found on Google (or maybe Google would have the same listings, buy way back in their results).