Some Useful XML Links:

http://msdn.microsoft.com/repository/ -- allows SQL Server DBAs to create an XML site.

http://www.geocities.com/SiliconValley/Peaks/5957/10minxml.html -- is probably the easiest explanation of XML I've seen yet, this is an excellent place to start.

http://msdn.microsoft.com/xml/c-frame.htm#/xml/ -- is the official Microsoft site covering XML.

http://www.w3.org/TR/1998/NOTE-XML-data/ -- the current standard for XML-data.

http://www.w3.org/TR/REC-xml-names/ -- the current standard for Namespaces.

http://www.w3.org/TR/REC-DOM-Level-1/ -- the latest standard on the Document Object Model.

http://www.textuality.com/xml/ -- a site for XML FAQs.

http://www.ucc.ie/xml/ -- more XML FAQs.

http://www.xmlinfo.com/ -- general XML information.

http://www.schema.net/ -- information on downloadable DTDs.

http://www.xmlsoftware.com/ -- the name pretty much says it all. You can find lots of XML tools are parsers here.

http://msdn.microsoft.com/xml/NOTEPAD/download.asp -- This is where you can download the XML Notepad from Microsoft.