I like how Chris Dixon incorporates stuff he learned doing an MBA into his startup blog. Those are two different worlds and there aren't many people who are fluent in both. I'm not very interested in the bulk of what MBA programs teach; perhaps it's my ignorance, but it seems like a lot of voodoo that is mostly about solidifying corporate culture with an elite caste of guess-who at the top. But some of the ideas that Chris has written about that come from there are quite interesting and relevant to our world -- his post on commoditizing complements, for example -- so it seems like he's a pretty good filter. (It's sort of a unique niche in the startup blog world, too. Positioning?)