Semantic Web Dot Org is the new name for Onto World www.semanticweb.org 
This is semanticweb.org, the wiki for the Semantic Web community. Our mission is to provide a knowledge repository and platform for advertising events, spreading news, and announcing new developments. It is a wiki: everybody can quickly edit its content, even without logging in. So look around and participate!
It is still a site for links about Semantic Media Wiki and the Semantic Web.
It has a copy which can be used to try it out which is at sandbox.semantic-mediawiki.org
See original on c2.com