I've been using Myth for a while now.
What with a life and all I never really got the time to dig into the development side of it so I spent what time I could getting a wiki up and going 'cos I hoped it would help the community in another way. It turned out to be reasonably useful and eventually got too big for the hosting service it had. Since Isaac has big pipes he's now hosting the wiki (thanks!) and we've moved over to MediaWiki (mainly 'cos Baylink likes the discussion features I think ;) )
Eventually we hope to migrate the old pages and history over here.
Me, I'm not so sure about MW - it doesn't do smiley faces properly :(