I posted v1.0 of the filetagger in the new PyPop format. The XML definition of the app is 310 lines and about 12K. I think this could end up being quite useful.

The code is here -- I don't have the actual running PyPop up to run it, though. I still want to get registration of file extensions working -- oh, yeah, and what there is of the help system. The help text is included but there's no command to display it yet.

If I end up defining a basic XSLT processor on top of the XMLAPI, this could start to get really interesting...