Will Facebook's Business Model Work?

Shel Israel argues that Facebook’s revenue ideas have gone from awful to worse. He has compared Facebook to “an old college romance. It was torrid at first and I thought it was true love. But then there came a series of unpleasant surprises in her behavior. One morning I woke up and discovered she who had been so lovely so recently had become downright ugly to me.” While I’m not sure about Shel’s analogy I have begun to wonder how Facebook is going to grow their revenue.