Blogology 101: Forbes.com ranks the best blogs in five categories, but makes you jump through hoops to find out what they are (links within links and pop-ups, ugh!). I'll do the hard work for you. I ashamed to say I'm not familiar with most of these (except, of course, for my buddies at Slashdot who publish my book reviews), so I post them without comment (imagine that!). I suspect all are worth checking out.
Tech
Media
Economics
War