FAQ 270 - LJ Talk updates

We should update the LJ Talk/FAQ 270;links and verbiage to reflect our recent code and server changes. Edit in bold.

EDIT #1
LJ Talk allows you to communicate with other LiveJournal users through Instant Messaging (IM) using the XMPP protocol.

-- Reason: The original link to jabber.org is dead. We don't use jabberD anymore. XMPP is the open protocol we use.

bt