I think reddit has a very valuable , but little used content stream: the "friends" section, because some users usually contribute very high quality content , in specific sub reddits, but not in others.

And just enabling collecting such friends, sharing them amongst people, filtering some sub reddits, or maybe by minimum relative karma,etc and building a content feed seems very useful.

and if that feed was indexable by Google - even more useful.

What do you think ?