I've been thinking about this space a little too & seeing your site reminded me of a tv clip I saw some time ago that compared the western and eastern approaches to social networking.
The western approach was described as bringing your real life network online (fb etc)[1] and the eastern approach was described in terms of sites that allow people to create temporary ad-hoc networks based around shared interests. The example of this given in the program was mixi.jp which is apparently huge in japan.
This latter approach seems to be closer to what you are trying to do. It'll be interesting to watch how far you get with this, so please keep posting to hn to keep us up to date.
[1] This description works for fb but I don't think it really applies to twitter.
The western approach was described as bringing your real life network online (fb etc)[1] and the eastern approach was described in terms of sites that allow people to create temporary ad-hoc networks based around shared interests. The example of this given in the program was mixi.jp which is apparently huge in japan.
This latter approach seems to be closer to what you are trying to do. It'll be interesting to watch how far you get with this, so please keep posting to hn to keep us up to date.
[1] This description works for fb but I don't think it really applies to twitter.