O'Reilly Network: XML
   A place to discuss the Extensible Markup Language and its family of related standards from the W3C.
   http://www.oreillynet.com/cs/user/forum/cs_disc/244

XML-Hypertext
   Mailing list for discussing technologies for linking and pointing, hypertext-oriented transformations, and interactions between XML and Web infrastructure.
   http://lists.usefulinc.com/mailman/listinfo/xml-hypertext

xml-doc discussion group
   A Yahoo group for XML documentation and publications, such as DocBook, DITA and TEI.
   http://tech.groups.yahoo.com/group/xml-doc/