SEO blogs

I keep looking for good blogs that talk about Search Engine Optimization, Internet Marketing, Affiliate Marketing, E-mail Marketing, Internet Advertising. The ones I generally come across are associated with a Online Marketing firm, using the blog platform to promote business. I agree, business is a important and core for all activities, however I believe blogging is all about sharing. So please mail me when ever you come across a blog thats bias and we all can learn from there. I would love to link it from this blog.

My intention is to keep sharing from this platform and link to all good resources for everyone in this industry.