I am a science writer.
As such, I am one of many who claim membership in the scicomm* community, which has a vibrant internet presence. When I first decided to pursue a career in science writing, I spent a lot of time seeking out scicomm blogs, videos, Twitter feeds, etc. etc. etc. Suddenly, my daily media diet was far too rich. It's extremely difficult to keep tabs on what people are talking about, especially now that I am a full-time graduate student.
I suspect that I am not the only person who feels this way. That's why I would like to develop a discussion strainer (tentatively nicknamed 'Colander').
The application would work like this:
* You point Colander to a list on Twitter and define time parameters, e.g. the past day or week
* Colandar develops an internal word frequency list
* Colander presents (1) a list of the top 10-20 terms, (2) a graph showing the changing popularity of those terms over the given time period, and (3) any particularly popular comments on the topic