Hmm, but the thing about Twitter is that it really only gives you interesting things to read within your existing group of followers (At least for me).

Intelligent readers like Google Reader can recommend you new feeds that you might be interested in based on your existing subscriptions and the people you share your 'shared feeds' with.

On cruft, maybe its time 'inbox zero' applied to your RSS reader too? I tend to drop more informative feeds into a single folder and read from there.