Unless I'm reading this wrong: is this a search engine that indexes everything Google doesn't? I can see this being valuable for closed groups that define their own objectives i.e. a SubReddit-esque set-up where one can search for information on a theme say finance. The quality of results on the meta level risks to be lower. On second thought, the idea of Google now indexing my personal info because I hooked onto the graph? Not sure how comfortable I am with that. Intriguing if Google does not index it. Cool idea though, good luck with it!