Its been a different ballgame up until now for Zuckerberg. He could do what he wanted but come tomorrow, it will be a different story. Shareholders would like to see value for their investment. There's already rumors that FB is testing some new ways to monetize including the 'Spaghetti test' charging users in New Zealand to pay $2 to 'highlight' their post and make it reachable to the friends list in one's profile. More on the WSJ Article here. The more important question is for us webmasters/marketers.. FB will definitely change the playing ground.. and for example, I wouldn't be surprised if they make some clear classification between 'Paid/Premium' pages and 'Regular' pages for starters. Maybe limit the # of users to a free FB page or something like that. Either ways, I personally think that FB is making a mistake by going public. And although I wish not to say this.. it could give Google+ just the right leverage.