Yeah good method as long you are not planning to spam Web 2.0 properties. Make it look natural using good content.
Do you have any proof or reference about Google ignoring this strategies? In my opinion, if the sites your building provide quality you will receive quality.
What exactly do you mean by that? That new content is important? How often (say per week or month) should new content be added? More or less?
On average do you find you do more promoting than actual writing? I enjoy the writing but struggle with trying to do all this linking and extra leg work.