You all read and write OPML subscription lists, right?
Let's go one step further, and let users subscribe to OPML subscription lists.
Each such list is readable over the Internet, the same way RSS feeds are.
As often as you would read a feed, read the OPML file.
If there's a new feed in the list, and the user is not subscribed to it, add it to their feed list.
If a feed has been removed from the list, and the user was not previously subscribed to it, remove it from their feed list.
It means the list can be maintained by another piece of software, or by another human being. A domain expert, for example. Ezra Klein might keep a list of feeds a good liberal blogger would read. Or George Will would keep a list for plutocrats.
Spotify could give you a list of feeds to follow for your favorite bands, and that list would change as your musical tastes evolve.
The New York Times could provide a list that tracks the major political issues, and when one dies out, it would be replaced by another.
Jay Rosen, Doc Searls. Josh Marshall, John Gruber, The Economist -- they could all provide opinionated selections of feeds you will find essential.
You could have lists maintained by applications designed to track your interests and interests of thousands of other people, and add feeds to your list based on what those people are following.
In other words there are whole new areas of technology waiting for you to add this feature!
Now why should you do it?
Because it's the kind of feature that will appeal to the early adopters.
Reporters, editors, bloggers, podcasters, super-fanboy types.
People with itchy feed-reading fingers. Whose palms sweat when their favorite feeds update. Who love the idea of getting new feeds without doing any work. They want to know what's up before anyone else does.
These people in turn influence lots of other people. They will talk about your product, and that will build your presence, and help other people learn how cool your stuff is.
I want to provide a curated feed list for people who read my blog.
I already have it, but I'm looking for an excuse to clean it up!
It takes a couple of days at most.
The hardest part is maintaining a reference count on feeds, so you know when to remove it from the user's main list (it might be in two or more lists, so having it disappear from one just means its reference count goes down).
And when you do it, let me know so I can sing your praise.
Feedly is going to do it in an upcoming release.