Peter Lindberg, of Tesugen, reads a startling amount of quality stuff, and consistently (I mean always, for as long as I've been reading) pulls out the best quotes and has massively perceptive, original comments.
There's nothing to say about Erik Benson except that his essays are chock-full of genius ideas, and you should read everything he's written for the last month.
At BlackBeltJones, Matt Jones has been pulling together concepts from all over the place. Fantastic brain buzz material.
(And during my time of joblessness, enjobbedness, enforced-but-actually-very-pleasant offlinetime, I've done nothing but move house and write a single Upsideclown: Extelligence.)