I recall running across c2 a few times .. there was also everything2.com from 1998 which was/is a community wiki with its own engine, and kuro5hin.com from 1999

I recall running across c2 a few times .. there was also everything2.com from 1998 which was/is a community wiki with its own engine, and kuro5hin.com from 1999 which was wiki-ish as well