http://www.jabber.org/what-is-jabber"Jabber is:
An open, secure technology for instant messaging and a whole lot more.
A friendly community of end users and developers who value freedom of communication.
A decentralized network of IM services in which your messages are not monitored by a big company like AOL, Microsoft, or Yahoo. You can even run your own server!
A set of stable standards for real-time communications, published by the IETF and the XMPP Standards Foundation.
Instant messaging the way it was meant to be!
In other words, Jabber is NOT a closed, insecure, unfriendly, centralized, proprietary instant messaging service like AIM, ICQ, MSN, or Yahoo."
Basically it will provide you with the opportunity to run your own Instant Messaging server that is in house and secure. Your private info is not being sent over third-party servers.....