Has Facebook Become The Master Key To Unlocking The Web?

Has Facebook Become The Master Key To Unlocking The Web?: "Has Facebook Become The Master Key To Unlocking The Web?
May 4, 2011 at 9:00am ET by Danny Sullivan

When Facebook rolled out its Send button last week, I laughed. I even mocked on Twitter that Facebook wouldn’t be happy until our pages were full of buttons. But the Send button, as well as integrating other aspects of Facebook into websites, does make a lot of sense. In fact, it’s beginning to make so much sense I’ve begun to wonder if Facebook has won the battle to be the one true login."