THIS.
You have to focus on providing answers. It always goes back to "the consumer." Build a website and optimize it for the user, not the crawlers.
And in reply to vgeek's post above. I definitely see that Google has to appease to the shareholders HOWEVER, no one is going to want a page full of ads when they search a query.
Just because a company may have an unlimited budget to spend on PPC for a query does not mean that their ad itself has the answer to what the user is looking for. So the whole statement that Google's job is to provide answers and not traffic to websites is a broad statement and in my opinion, should apply to both SEO and PPC.
Focus on providing value to the user and you'll be fine no matter what. And for fuck's sake, focus on building a real business and you won't be shitting your pants in anticipation of the next Google update.