At the old place we had a wiki.  I think it could be a useful resource here if there is enough interest.

I really loved that Wiki idea. If we actively kept it updated then there is a ton of potential. Just like the current site I'd think a public and a private version would have some appeal.

A Wiki is great idea if it is constantly updated but I will bet my money on that it will die silently after three weeks

the Tweaky wiki

I think it's an awesome idea and even if it's not updated regularly it could be still very useful, as there is always something new you may learn (especially valid for abbreviations!)

I think I just heard a volunteer to manage the wiki 

absolutely...after the McAfee's FAQ can handle just about anything