Guys, you can try out MediaWiki here
Main Page - MediaWiki Demo
There are other wikis to use.. I'm trying out PmWiki as its simple and useful to be integrated into a website that doesnt have MySQL, but MediaWiki is good for our purposes because it can integrate with CE Forum accounts! (that is, the vBulletin forum system), and is the same system that Wikipedia uses
Its not THAT bad, xhx! Basic buttons here and there, but its very easy to add content. Try out the demo, and click the [edit] tag to add something!