dating site matching algorithm

Hello there, I have some friends developing a dating site and we need to run a matching algorithm ( or script) that can identify new registered users in a particular area, that matches other users own dating criteria . the idea is that every person that signs up gets the chance to be sent a periodically email with his/her newest matches for that particular timeframe. ( the matching criteria is about where he/she lives, gender, marital status, age, do drink/ doesnt drink.... etc, etc. I need some good programmer with experience in dealing with algorithms, let me know if you can help. Luis.