From the site:
Meatball Wiki aspires to be a community of communities: an intercommunity or metacommunity. It deals with online culture, especially how people online come together naturally in groups. Along with that, some of us also like to talk about building our own communities.
Meatball is a loose grouping of people who are interested in online communities, culture and hypermedia. We talk mostly on Meatball Wiki and sometimes on the Meatball Mailing List. The original goal was to focus on Collaborative Hypermedia but topics have ranged from intellectual property to Cyber Punk to the confusion of Uniform Resource Identifiers. Occasionally, some of us bother to stop blathering and do some real work. You'll find some project journals on Meatball Wiki too.
Community discussions about how to run the community itself should be left here. Abstract discussions, or objective analyses of community are encouraged on Meatball Wiki. -- Sunir Shah
It runs a hacked-up version of Use Mod Wiki.
I am considering rebasing meatballwiki.org 
. Since Meatball and c2 are inextricably bound, I ask for your opinions here. -- Sunir Shah
Meatball Wiki is locked on account of spam problems since 2013. The homepage of the wiki does not give any explanation about that.
See original on c2.com