These are blogs and places I read daily that are of a more professional or business nature even though they might be written by individuals. Usually I read these on Bloglines.com RSS reader.
Good blog about blogging
Dave Naylor, one of the top SEO's. Always insightful.
A look at the search industry with a warped sense of humor. Great fun.
Want to generate revenue with your blog or just be a professional blogger this is the place to read.
The essential highpoints of SE news.
Best search engine industry news.
Sebastian talks about SEO
Good SEO news summarys and look at the web. Plus the book is worth buying.
Bill Slawski's very thoughtful insights into SEO and search engines. Bill is a long time admin. at Cre8asite forums and really knows his stuff especially about patents and other legal issues.
You can find a list and links to the SEO/marketing forums I lurk or post at on my own start page. :-)
Marketing and technology discussion.
My friend UKGimp conducts interviews of personalities in the search world.
Greg Boser, long time WmW mod and Admin. really knows his stuff and can generally poke hole in the Google propaganda machine.