You probably heard of Matt Cutts. He's working at Google and has his own blog called Gadgets, Google, and SEO. Why would this interest you? Because you'll find many interesting things, some from 'behind the curtains', some about what Google does and how it works.
Don't expect to see full disclosure on how Google ranks sites for example. Just tips, tricks and sometimes hints on what you should or shouldn't do.
Also, he has a few videos you should really watch if you're into the SEO business: start with the SEO Myths and follow the links from there