Tristan Davis has a great post over on the Word team blog about working with content controls and binding them to custom XML data parts. It's a clear and straightforward explanation of this powerful concept, so if you've wondered what terms like "content controls" (or structured document tags) and "custom XML data store" are all about, be sure to check it out.

Brian Jones has posted links to some related content, including videos on Channel 9 and other posts Tristan has done on content controls and related topics.