Yes that's precisely what the Snikket project is about. There also joinjabber.org (disclaimer: i'm part of it) which is just getting started: we don't build an

Yes that's precisely what the Snikket project is about. There also joinjabber.org (disclaimer: i'm part of it) which is just getting started: we don't build an XMPP distribution, but part of our mission is to evaluate and/or recommend clients based on high-level features and usability for end-users.