[arek2]

Someone asked how I implemented the video chat. It's a P2P technology called RTMFP (http://en.wikipedia.org/wiki/Real_Time_Media_Flow_Protocol), built-in into Flash. My server does not transmit the video.

[arek2]

Also, people asked about the recommender system. I was 43rd in the Netflix Prize, and you can try out my other recommender systems at: http://5000best.com/movies/Personalized/ or http://5000best.com/movie-galaxy/

I also wrote a 195-page e-book on recommender systems: http://arek-paterek.com/book/