http://id3.org (http://id3.org)
Shows spam to me... not sure since when.
EDIT
Uploaded my local copy of the ID3 specifications for anyone who cares
http://www.foobar2000.org/id3/ (http://www.foobar2000.org/id3/)
Whois: Last Updated On:02-Oct-2012 03:16:59 UTC
Perhaps domain name expired and a carpet bagger has bagged it.
Latest copy in the Archive: http://web.archive.org/web/20110718210736/http://id3.org/ (http://web.archive.org/web/20110718210736/http://id3.org/)