3quarksdaily. Just another blog, sure, but a good one. 3quarksdaily is a filter blog much like our very own, but with only 15 users (and an editor). As they say on their about page "On this website, my guest authors and editors and I hope to present interesting items from around the web on a daily basis, in the areas of science, design, literature, current affairs, art, and anything else we deem inherently fascinating." The do an admirable job.