I particularly like the following quotation of The Secret Diary of Steve Jobs on Facebook.

You have to remember what Facebook’s core business is about. It’s not about helping people stay in touch with friends or express themselves. It’s not about changing the world or creating an ecosystem for small apps makers. It’s not even about selling ads. Facebook is a vehicle through which a bunch of investors in the Valley hope to turn a small pile of money into a much bigger pile of money by selling shares in the public markets. That is Facebook’s core business.

via [Valleywag]