Each taxonomy term has an outline node, which contains child nodes. The first child shows the term's description, and has a link to the term's web page. Subsequent children are links to articles directly related to that term, followed by recursive outlines of sub-terms.
Dave Winer put my OPML site map feed into his OPML World Outline, where you can browse it as html, and OPML Search has automatically indexed the content on my site! That's quite cool, and it's just the tip of the iceberg -- many interesting applications are possible!