Just launched at the end of June 2007, Pownce is a microblogging/social networking site created by Digg founder Kevin Rose that has become one of the most talked about new services among the Silicon Alley set. Invitation only at present, invites are being auctioned off on eBay and are highly coveted much in the same way as Gmail invites were upon its initial launch. Users set up a buddy list which they can then send not only short messages (similar to Twitter), but also invitations, photos, music and other files, making it a more exclusive P2P network. Content can be sent to one friend, a custom group of friends, or even the whole list. I imagine that once the service becomes open to anyone, you’ll be hearing even more about it.