I would like to create a fairly simple social network. The users need to be able to have their own profile with a picture and some basic info. Grouping users by location is important (similar to craigslist cities). Users need to be able to have feedback left by other users. Communication between users via email messages within the website is needed, chat would be nice. Categories are needed for users to search other users. Total system and users need to be browseable by other users.
There also needs to be a secure system of credits which need agreement from both parties to be received.