No, Facebook is not advertising yet on mobile devices. Yes, that hasn’t stopped people from speculating on what it will mean when it does. The latest: an estimate of how much the social network stands to make from mobile advertising: more than $1.2 billion a year in the U.S. and its five biggest markets in Europe — the UK, France, Germany, Italy and Spain.

The numbers come from UK-based analyst firmMobile Squared, which has worked out that Facebook will be making an average revenue per mobile user of around $6.50 per year — some $2 more than Facebook currently makes per users online, using figures supplied in its S-1 earlier this month. The caveat here is that the modelling appears to be hinged on mobile display-style ads, while in truth it’s not known what Facebook will do when it comes to formats; and several reports have pointed to them first opting for something altogether different — sponsored stories.

This is how Nick Lane, chief strategy analyst, arrived at these figures:

He estimates that across these six markets, there are a total of 185.3 million users of Facebook on mobile. (That’s something worth noting in itself: Facebook has something of a long tail when it comes to mobile users it seems, with the top six markets still accounting for less than half its 425 million mobile users.)

Read More:  http://techcrunch.com/2012/02/17/analyst-facebook-will-make-1-2-billion-annually-from-mobile-ads/