This project seems shockingly ambitious. I think anything that you get, you will have to write quite a bit of manual stuff for your specific use cases. I think

This project seems shockingly ambitious. I think anything that you get, you will have to write quite a bit of manual stuff for your specific use cases. I think quite a lot of work has gone into the Netflix Prize and the discussion of this has a lot of useful points. Also, did you check academic research on citeseer?