What would a better feedreader be like?

1. It would help me find new feeds. I mean, really help me.
2. It would be social: I could easily find which feeds my friends are subscribed to (publicly) and such.
3. It would let me manage my feeds better.
4. It might support commenting and discussion in some smart way, without taking the discussion away from the sources.

Of course, the barriers to entry in the feedreader space are huge. Entrenched market leaders. Huge scalability challenges for newcomers.
And of course, the only real way to move into that space is probably to do something very different from the current feedreaders. But they are good. Just not good enough.