Ask HN: Is there RSS/newsreader software that groups related stories together?

In my modest (71-feed) Google Reader, much of what I see is essentially a repeat of other things. A press release goes out, a few blogs pick it up, a dozen more echo it, two or three do some good analysis, and a few hundred comments pile up under blogs and in reddit and HN.

Is there a solution to this that I can use to browse through the topics that the blogosphere is talking about today, along with the various comments?

If not, I already have a domain name picked out.