Following a rather bold claim regarding the iPhone's alleged status as O2's fastest selling device in history, the carrier's CEO paid a little visit out to Cupertino last week to brief Steve personally on just how warmly the iPhone has been received across the pond. Chief Executive Matthew Key says that he expects 200,000 iPhones to be sold on his network by the end of January, meeting O2's expectations set prior to its November launch -- despite the fact that analysts are claiming many more could be sold by then (we suppose it's better to underestimate than overestimate). That's not really the big news here, though; Key also told Jobs that his network's iPhone customers are consuming data at a far more aggressive rate than others, with a full 60 percent using 25MB a month or more compared to just 1.8 percent among the general O2 populace. That, of course, is where the real money lies for O2 in this whole exclusive iPhone deal with Apple, since Cupertino is doing a magnificent job of siphoning off virtually any hope of profit from the hardware itself. In other news, Key says he's confident that O2 will snap up the 3G version of the iPhone when it's launched next year -- especially since Vodafone, Orange, and others should be locked out on account of O2's multi-year contract with Apple in the UK.