Michael Martinez's blog is good, and the links in his blogroll are good too. I usually spend about half an hour a day reading the top 10-20 results from putting "seo" into
Google blogsearch and narrowing things down to the past 12 hours, though there can be a lot of crap in there. People seem to have way too much to say about SEO in general, and a lot of moaning goes on, so it might get tiring after a while
