No, not really. The exact same Telepathy backend as the n900 is there, but in harmattan this is wrapped up behind single-sign-on 'services'. The jabber backend is there and used for google talk and facebook chat, but there's no UI for generic jabber yet.

You can add it from the command line though. It won't be long before this gets a gui from the community, and support for the same protocols as the n900 had.