interesting, I just submitted "tldr" as one of the ideas to yc application in answer to the question "If you had any other ideas you considered applying with...":) I call it cogist (I was thinking of using mturk to do it since my nlp skills are outdated/non existent - "co" gist:)
I think there's going to be a minor explosion of tldr services in the coming months. So many people are working on it, and the technology is just about acceptable.