There was once a feature, I think it was in LW, where you could put in, what intersts you, to get into gnutella groups (subnetlike, but not closed).

Does this still exist somewhere, or did it go extinct?

I think it is a pretty neat feature, because the network optimizes itself around the users, when you use that. There is already vendor preferencing, why not introduce group-preferencing?

I'm using Acquisition, so I doN't know, if this is already implemented, or reimplemented anywhere.