Despite some doubts about the usefulness of Jason Shellen's proposal for beautifying feeds with CSS stylesheets, I like it (choice #3 to be precise).  Can someone pull together a stylesheet for RSS 2.0 so we can do a taste test?

As to the problem of making it easier for news aggregator users to subscribe, aggregators will have to ship with a browser plug-in or do it like Radio does via a well-known port and URL.