[Hassle]

One major drawback with iPads when surfing or at least posting replies on forums is if you go and check you facts on another site the wonderful eloquent reply you have already typed disappears as the page is reloaded when you tab back

[Alistair]

Yup, that's it, you pay x£ more for it to have. SIM card facility, you get a free sim from O2, ou pay a tenner. Month and your ipad works everywhere there's a mobile signal, If there is an available wifi signal it automatically uses hat in preference to the SIM card. If you don't pay the tenner a month it just works like. Wifi version.
My version also does all the GPS type stuff as well cos its got a mobile signal, te wifi one on does this if its connected to wifi.