We have been doing this for a while at http://friendbinder.com
There are also a number of others like PeopleBrowsr, SocialThing (bought by AOL now AOL lifestream), Threadsy, EventBox and Ping.fm (for posting) that are trying it.
There are also a number of others like PeopleBrowsr, SocialThing (bought by AOL now AOL lifestream), Threadsy, EventBox and Ping.fm (for posting) that are trying it.