I first got interested in Greg Mankiw's blog due to his Pigou Club (carbon tax supporters). I'm subscribing for Pigou updates and an ongoing stream of interesting posts. Apparently Greg was an economic advisor to George W. Bush. That sounds like a hopeless position, as GWB doesn't seem to take advice from anyone but the tooth fairy.
My first blogroll addition was Jon's Radio.
Blogs, environment, politics, technology and the kitchen link, often all in one post!