Next: JEP-0068 (Field Standardization for Data Forms), Previous: JEP-0055 (Jabber Search), Up: Protocol support
JEP-0065 support seems to work, but it is not yet enabled by default.
Currently jabber.el cannot act as a server, not even on on Emacsen that support server sockets (GNU Emacs 21.4 and up). Therefore it relies on proxies. Proxies have to be entered and queried manually.
Psi's “fast mode” (http://delta.affinix.com/specs/stream.html), which gives greater flexibility with regards to NAT, is not implemented.