Skeptical about the power of blogs? Here is another example from adtech reported on Revenews.

GMD’s Clark described how they rolled out a multi-faceted campaign for Audi called “The Art of the Heist.” The result was a entertainment experience that relied heavily on blogs yet tied in various other advertising and promotional elements that immersed participants… Clark said the blog component of the campaign was one half of one percent of the marketing spend and generated..29% of the traffic to the Web site.