One of the most entertaining and knowledgeable photography writers on the net is probably Mike Johnston. I started reading his The Sunday Morning Photographer column on Luminous Landscape 3 or 4 years ago, subscribed to The 37th Frame, and then followed his blog The Online Photographer since it started over a year ago. You don't have to agree with his opinions to appreciate his knack for writing about photography (and a wide range of only mildly related topics as well).
Anyhow, his blog apparently went into some sort of spambot meltdown over the weekend. It's now up and running again on it's own The Online Photographer domain. If you've never read, it's well worth following.