Kinja is the latest product from the most interesting Web-based impresario of the current moment, Nick Denton. He's the fellow behind Gawker, Wonkette, and Fleshbot; his sites are so good, it's a shame to report that he's British.
Kinja is an aggregator for blog content. As this NY Times account explains, "the site automatically compiles digests of blogs covering subject areas like politics and baseball."
It's well worth a look and a tryout.