Ben at Classical Convert has compiled a list of the top 50 classical music blogs, as arranged by Google Reader subscriptions (where the CPB is #23), Bloglines subscriptions (#30), Technorati authority (#19), and Google incoming links (didn't make the list).
A big thanks to Ben for take the time to compile the stats on a huge number of classical music blogs. I hope that he'll be willing to update this list on a regular basis (monthly? quarterly?).