Currently considered one of the most cutting edge science fiction writers, Stross's best works include Accelerando and Glasshouse (interviews here and here). His blog is often worth reading. He might be considered a key example of the current wave of British SF, which is generally considered to be much more exciting than what's currently coming out of the American sf scene. Many of these writers have the reputation of being pretty far to the left by U.S. standards--though I often get the feeling that they are just much more confident about their leftist point of views than those amongst the American writers who are on the left. Here in the states I have the impression that it's the writers with views from the right who incorporate those views into their fiction with similar confidence and surety.