That could be done once gossip is in place, but this may not be the best approach for all clients. I foresee a future where we have many different kinds or types of relays used for various things. We have this kind of support now, but I see it expanding. For example, we have search relays, new user filtering relays, 140 char maximum relays, phone book style contact relays, archive relays, RSS feed relays, etc. Specialized relays and community sized relays will be where we're headed.