Hi guys, i just found out about folder-rss and i think its great! I wanted this functionality some time ago and programmed my own tool FolderFeed to do just this using XML serialization in .Net to produce valid RSS 2.0 xml data, i noticed that your tool had some problems with producing valid xml, so you might find it interesting. Would want to help out.

You can download the tool and source code at:
http://ramis.mine.nu/folderfeed/