Only one of each, according to me, highly subjective:
Technology: Danny Ayers’ Raw provides one stop for very well done semantic web (and nearby) news and analysis, written at a level perfect for me. He also has a knack for posting about obscure (to me) topics I’ve wondered about recently, or will soon, most recently about accounting for whether something is known.
Policy: Ronnie Horesh doesn’t post all that often and his Social Policy Bonds Blog is mostly about one topic. Regardless of what you think of his proposed implementation, Horesh’s mantra, that policies should be subordinated to outcomes, is so simple, obvious, and rarely followed, that it needs to be heard around the world. Here’s to a great new year.
Ideas: Brad Templeton posts (mostly good) Brad Ideas. Many are moderately ambitious, few are crazy. Executives with more ambition than imagination (especially airline executives), please read Templeton’s blog. The most recent Brad Idea, that crash avoidance technology could be financially justified by lower insurance rates, is less concrete than most.
Sorry, no recommendations for celebrity gossip, sex, photo, conspiracy, spam/seo/marketing, or war blogs.