There is another free hosted wiki option to add to the mix. Wetpaint looks pretty darn slick.
Combining the best of wikis, blogs, and forums, Wetpaint is the canvas where everyone gets a brush. From personal expression to collaboration, Wetpaint empowers you to connect with others on whatever you’re passionate about.
I kind of wish I had read about it before I started the LITA National Forum wiki. I’ll let you know more once I come up with an idea for a site to try on Wetpaint – but for now you can read a thorough review on TechCrunch.