"Transforming OPML into XUL"

I was trying to learn more about the XUL tree widget this evening, and wrote up a quick XSLT for transforming OPML into a XUL Tree:

• The OPML
• The XSLT
• The output

Mmmm, a XULRunner stand-alone outliner... wah, we don't have editable trees in Mozilla yet :(