Create an OPML from Safari RSS feeds

MacOSXHints has a simple trick for creating an OPML file, completely with folder structure/groups, from your RSS feeds in Safari. The tip basically involves downloading an XML stylesheet the author created, and using it in a Terminal command to generate the OPML file.

I'm glad someone found a way to put this together, but with the open standards and portability of RSS and newsfeeds, I think it's kinda bad form on Apple's part to not have baked this ability into Safari already. Nevertheless, MacOSXHints has come to the rescue, yet again.