RSS 2.0 with OPML 2.0
Tuesday, August 28, 2007 by Dave Winer.
Here's an RSS 2.0 feed with an item that contains several outlines, basically the show notes for a podcast.
You might have to View Source to see what's going on.
It's like chocolate and peanut butter. Both flavors are tasty, but when you put them together, it's even yummier!