Meatball is a loose grouping of people who are interested in online communities, culture and hypermedia. We talk mostly on MeatballWiki. The original goal was to focus on collaborative hypermedia but topics have ranged from intellectual property to cyberpunk 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 MeatballWiki too.
In particular, it has influenced much of the design of the software that runs this site, UseModWiki, as well as other wikis.