Carnegie Mellon blog ranking study

Rankings always have their faults, and this one is so over my head I can't even begin to determine its validity (some Carnegie Mellon math genius came up with the method), but it's still always interesting to have a look. The question the survey tried to answer: "If we can read 100 blogs, which should I read to be most up to date?" Many of the blogs they picked I've never even heard of (though that may reflect more on me than their survey).