I'm working as a telecoms engineer at the moment (for a company which shares it's hue with easyjet) and there are no
3rd generation providers in the uk yet, so that kind of access by mobile is a little bit further into the future.
All the main mobile companies are building networks to support this kind of thing, but they probably won't launch until next year and the coverage will be pretty sketchy for some time....
(Just in case somebody from our corporate security works out who I am..... We have the best company and will be providing this service faster with higher quality than anybody else etc etc blah blah)
Hopefully, I'll be flying full time by then so won't be able to afford a phone anymore.......