I found my first surprisingly intelligent use of Twitter: http://flixpulse.com/. It scans tweets, analyzes word stream, and reviews movies!!
And the really cool thing is that people aren’t intentionally rating a movie. They’re just flinging their opinions to the masses. This, it seems to me, is a fundamentally different data stream than an intentional rating function. Some academic ought to study this.
The language-processing capability has loads of applications. A marketing department could analyze product/company reputation; political analysts could analyze preferences; each of us individually could analyze our own reputations; state departments could look at their national reputations or the feeling people have toward particular issues.
Hmmm. What could us learning-and-performance people do with this?
Keep this one top of mind so you can look for opportunities.