Ask HN: Resources for Online Biz Optimization

I am going into some business discussions on what I am going to call online business optimization i.e. optimization from the perspective of an advertiser in the areas of SEM, SEO, display ads, tracking of visitor behavior on your site, A/B testing of various site features, using social networks for marketing and sales.

I need to come up to speed quickly on these topics. Most of my web searches find superficially written thinly disguised marketing material.

I am interested in recommendations for both online articles as well as books on these topics. I have a highly quantitative background, so fairly mathematical books/articles are welcome. Generic statistical textbooks are of little use to me; I already quite familiar with those topics. However adaptation of these techniques to online biz optimization, if not obvious, can be valuable.

I understand this is a broad request, but all well-written articles/books in this area are welcome. I can save some of them for later reading.