"...Though there are a number of IM options for Emacs, one that works particularly well with minimal fuss is Jabber.el, a robust and configurable Jabber client that supports basic Jabber/XMPP and multi-user chat. You can download it from the project's Sourceforge page ..."
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Support Free Software? Then Ditch Proprietary IM
http://pthree.org –
"There are a few things that I find ironic about most Free Software geeks. They’ll support the philosophy of GNU and Free Software until the cows come home, but they’ll continue to chat with their buddies over proprietary IM protocols, such as MSN, Yahoo!, AIM, ICQ, Gadu Gadu, Skype and more. Well, it’s time to ditch the legacy IM protocols in favor of Open Standards, such as IRC, XMPP/Jabber, SIP/SIMPLE and others..."
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