danja: that's novel, they seem to be making a good choice of tech: OpenID, OAuth (looks promising), Atom (useful for content, graph updates), RDF, OpenSearch (hmm, ok...but they say "our implementation of RDF willl be done in XML", which seems a bit odd), XMPP PubSub
deltab: xkcd readers, see also Federating Social Networks on XMPP
deltab: xkcd readers, see also Federating Social Networks on XMPP