Inc. magazine has an article online today that explores the notion of Low Budget, High Impact marketing. The Duct Tape Marketing blog is used as an example of using a blog as a low budget, high impact marketing too.
From the article:
His own experience as a one-person shop is one example. Without any advertising, the Duct Tape Marketing weblog has given Jantsch national recognition, through word of mouth, awards, and press coverage. His visibility led to a contract for a book to be released this fall.