Facebook's future is mobile? Does that mean it's a future with no money?

I wish I could have attended GigaOm's Mobilize conference. It looks like it was a great event. But I'm not sure if the right questions have been asked. Today, Ryan Lawler writes about Facebook's future -- yes, it's mobile:

At GigaOM Mobilize conference Tuesday, Erick Tseng, Head of Mobile Products for Facebook, said that the company may soon be more of a mobile company than one which develops for the web.

Tseng noted that of the 800 million Facebook users on the social network today, approximately 350 million access the service through a mobile device. “We will soon become a company where more than half of all our users will be mobile users,” he said.

In part, that’s due to Facebook increasingly seeing adoption in countries like India and China, where broadband connectivity isn’t as pervasive but almost everyone gets Internet through mobile.

Pretty sure I've written about Mr Tseng in the past...More importantly, has anyone directly asked hime or anyone at Facebook that matters where the mobile money *might* come from? It doesn't appear as if Ryan asked. This seems critical. The company is talking about 350 million mobile users, and confidently states that number is growing.

Do they even have a *plan* for revenues?