Successful webpreneurs sell an outcome not a tool to get there. WHy is it that peopel will pauy me a five figure sum for three weeks work onsite advising them but I can pour a year into something like CoPr and nobody wants to know, or three years of ideas into The IT Skeptic and hardly anyone buys a twenty buck compilation? Because on the websites I'm providing a tool to help them but I'm not giving them the result on a plate. When I'm consulting I'm providing The Answer, or so it is perceived anyway.
A site that sells business-card-management software is only selling a tool. A site that accepts your business cards scanned and delivers a finished database back to you is selling an outcome.
A site full of book reviews is giving advice. Amazon delivers the book.