Facebook's open platform is a game-changer
My friend Jonathan says: "to succeed in a market with no real switching costs (e.g. the consumer internet), when users invest in you, you must use that investment to make it better for them to stay, not to make it harder for them to leave." Facebook just provided a way for every consumer internet developer on the planet to make money from their site, *and* make Facebook more valuable. There's risk involved, but I think there's far more upside.