Memorandum is a very popular site that links to content from selected blogs. It’s a little hard to explain, but basically Memorandum contains links to blogger discussions on hot topics (meaning topics that a lot of people are talking about).
One problem I had with the original iteration of Memorandum was that the topics were too heavily weighted towards political discussion, and I don’t care a whit about politics. In fact, it bores me to tears.
Now, Memorandum has split into two sites: politics and tech. Personally, I don’t read the politics version, but the tech version is one of my every day reads. Politics or tech- either way you can find some good content fast via Memorandum.