Interesting. The pseudonymous Kyle Finchsigmate at The Chem Blog just gave some stats about his blogging. He gets something like 6000 unique visitors a day, while I get about 150. Admittedly, we have rather different styles (pseudonymity makes it easy to write with more, umm, gusto, and to slam lousy papers openly, both of which probably make his blog have more broad appeal), and there are a lot more chemists out there than condensed matter physicists. Still, the factor of 40 is a bit intimidating.