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This is a good idea, and would integrate very well with a tech job website.

I do think you should feature the "statistics" and "methodology" up top: I almost missed those.

I'm also very interested in string matching/text search, but in a very different area: http://www.ericbullington.com/articles/2012/03/26/libtm-a-tr... It's interesting how varied the applications are for these string search algorithms and data structures: a lot of the active research is this area is going on in bioinformatics (not full text search though, obviously). And then there's the kind of translation retrieval stuff I'm interested in, and you've found yet another cool application in commit histories.

I'm very interested in seeing where you take this idea.

I built this during the evenings at a full-text search conference - we tested it on our in-house repositories to allow our admin to know where to route calls.