I guess that makes you a dinosaur then Steve
The cost of an internet enabled mobile 'phone here in France is exorbitant. Close to €700 a year for the cheapest contract that actually includes some internet air time. So I haven't got one, and I won't get one until that cost is reduced by at least 2/3rds.
But if I did have one I would be using Opera Mobile and I certainly wouldn't be looking at Farcebook. Personal privacy is far to precious a thing to be entrusted to sneaky nerd like Zuckerberg.