We have just launched our brand new http://jit.si service. The purpose
of this service is to provide an easy way for people to make video calls
over XMPP using Jingle and a Jingle Nodes relay (Yay! No more NAT
Feel free to open an account and start talking!
P.S. Keep in mind that this is mostly a test launch. Jitsi is, above
all, a client. Development is hence our main priority and we will be
providing best-effort maintenance.
Hopefully other major XMPP services would also start providing
standardized relaying solutions in the near future.