clipped from www.news.com

"Most of the revenue things that we're doing in the short term, their focus isn't on building a large revenue stream," Zuckerberg said. Adding a payment system just makes sense, he added: "With a lot of applications, people need to pay for different things...You could go with an example like SuperPoke where people are buying sets of icons or signals that they can send to people, which is purely a social gesture but it's real capital that's being exchanged, or if you go with an example like a book or a song or something like that...A lot of these things can be inherently social or have large social components, and just kind of further the type of communication that's going on, but it involves real economic capital."