I’ve written before about how much I like wikis. I’m not paid by PBWiki in any way. Really! I do like the way they do wikis, though. There’s many others out there (they may appeal to you more than PBWiki…): Wetpaint, Wikidot, Wikispaces, and Zoho wiki. Actually, most are pretty user friendly.
Anyway, PBwiki has a series of upcoming webinars OR you could just jump right in and give a wiki a try. They really make for easy web pages and serve to promote collaboration.
Give it a try!