sort out the authentication of our JIDs on the server with OLPC keys
sign/verify salut presence adverts
implement jingle calls
fix XMPP scalability issues with a server component
keep a registry of activities so we can get the activity id and name from a central place
revisit activity enumeration, so we can do "find me activities of type $foo", or "get me some activities to fill up the mesh view"
revisit buddy enumeration, so we don't need the shared roster hack. it's possible that we should just find random people by finding random activities, and not worry about "get be some buddies to fill up the mesh view".