You know how your app reads OPML so people can import subscription lists?
It would be even more cool if your app could subscribe to OPML lists! ;-)
That way, when a new feed appears in the list you would include news from that feed. And when one is removed, you would unsub the user from that feed, automatically.
This would allow new products to be developed that are collections of feeds.
I've wanted this feature widely supported for a long time. We had it in Radio UserLand, the reader that started all this michegas. It would be great if Feedly or Digg or one of the others picked up this idea and ran with it.
BTW, the Wikipedia page for Radio UserLand could use an update to reflect that it was more than a blogging tool.
I happen to have a great tool for editing those lists, btw. ;-)