The power of Facebook is the activity of its users, according to Facebook executive Paul Buchheit. And the way the social networking site intends to expand its presence and membership is by bringing the power of those users to any Web site and service that wants to work with it.

Bucchet arrived at Facebook following the acquisition of its company FriendFeed. Shortly after, Facebook incorporated many of FriendFeed's features, including the newsfeed feature and what wound up as the Like button.

Integrating those features throughout the Web is the goal of Facebook's new Open Graph initiative, which essentially is a set of APIs that let non-Facebook developers to add Facebook features to their sites.

One of the consequences of this move is a growing concern over privacy. Buchheit defended Facebook's default settings by point to the benefits of sharing over keeping details private, which can be anything from getting a book recommendation from a friend responding to a post to something more impactful.

"It's hard to predict its value," he says in defense of what many consider over sharing, adding that ultimately it boils down to "serendipity."

Which is why the Like button is so important. Rather than relying on comments left by friends, the Like button allows users to indicate approval with little effort, which he says is the future of social media.

"I think we're going to see more of that," he said. "It's a very lightweight ways for people to stay connected, which is good because it lets you stay connected to more people ... and that means a more connected world."

Some people criticize it as being shallow. But he defends it by saying shallow conversations can spark deeper conversations offline when the virtual engagement evolves to the real world.