Linux.com

For IRC, freenode is a kickass place, its a free software / open source, IRC network.
Its a place full of free software enthusiasts and many free software projects reside there.

<a href="http://freenode.net/" title="freenode.net">http://freenode.net/</a freenode.net>
<a href="http://en.wikipedia.org/wiki/Freenode" title="wikipedia.org">http://en.wikipedia.org/wiki/Freenode</a wikipedia.org>
irc.freenode.net

OFTC is another nice place. It supports IPv6 and SSL connections too.
<a href="http://www.oftc.net/oftc/" title="oftc.net">http://www.oftc.net/oftc/</a oftc.net>
<a href="http://en.wikipedia.org/wiki/Open_and_Free_Technology_Community" title="wikipedia.org">http://en.wikipedia.org/wiki/Open_and_Free_Techno<nobr>l<wbr></nobr> ogy_Community</a wikipedia.org>
irc.oftc.net

A wiki can sometimes be a good idea too.
Or some sort of CMS for the website maybe.

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