Don't do the "friends" thing--reason: the friend zone. What would be interesting is if users could post content to a generic stream sorted by proximity, sex, an

Don't do the "friends" thing--reason: the friend zone. What would be interesting is if users could post content to a generic stream sorted by proximity, sex, and age. Users set thresholds for mutual likes before their information is made available to one or the other. The more you like another user's content the larger or more visible it becomes in the stream; the more another user likes your content the "hotter" (perhaps in color?) it becomes in the stream to you. The important thing here is to make sure there is a positive feedback loop between two users, ultimately creating content posts that are both "hot" and "large". If anyone is wondering, there are studies showing that compatible people like the same things, however obvious the notion may seem. If you want to beat a dead horse: allow fb users to add people they like to your service whom aren't their friends using their URIs on fb. Use fb's ad api to allow users to pay for highly targeted ads to these people they like (<--monetize this). This will also help solve your chicken and egg problem. Where two anonymous users add each other's fb URI, there is a match and both are notified (you can crush crush notifier). Bonus points if you can combine both these concepts into one service uniformly. This would be how I would make a dating service. Btw, nice domain name.