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You can choose from a list of your Facebook friends to pay and even post on their wall once your payment is processed. A little creepy, but we guess that's the modus operandi of the social network.
Lark said that Facebook has been an incredible partner to work with throughout the entire process, and saw the relationship progressing into virtual currency territory via the Kaching! app.
"We're working hard with Facebook on [integrating Facebook Credits], and we hope to do interesting things there. I think there are hundreds of applications that get spawned when you start doing that. There are merchants who can offer coupons and deals inside Facebook, [as well as] Living Social, Twitter.
"We have this long list of people we want to go and enable next. We're really excited about the opportunity, but we had to start somewhere and we couldn't bite everything off at once," Lark said.