Interesting. How about a gnutella client that can distinguish clients among different "groups". So you can be in the "80s" group and only receive connection from other "80s" group members. It would need a new message type in addition to the basic five, and it would be useless when faced with clients which were not using the specific. GDI wise, you could join a kind of channel like on napster, and then say you only want conections (or search results) from those people on the channell. any suggestions?