W3C Semantic Web: Resource Description Framework (RDF) Interest Group #RDFIG - Internet Relay Chat (IRC) for Semantic Web Developers
Member of the RDF developer community can also augment mailing-list discussions with real time Internet chat tools. IRC is one such tool. There are a number of public IRC servers in existence: while W3C doesn't itself run such a server for general developer discussions, members of the Interest Group can often be be found on the Open Projects IRC Network (channel #rdfig for general RDF IG discussion).