[elliottburris]

I'm in the process of putting the finishing touches on Slipper, which is basically what you're talking about. I've developed a number of algorithms that intelligently route posts to individuals based on a number of characteristics (including physical appearance & location, as you mentioned above).

We require facebook authentication, but we require no manual input from the user, so no need to subscribe to attributes or anything. All the analysis and routing comes from our back-end

Check out our splash page at SlipperApp.com. If you want to talk more, shoot me an email at elliott @ slipper app dot com - I can shoot you a beta download link if you'd like, and I love talking missed connections!