chatting, twitter, texting, facebook, youtube...any other online time sucking application they've got addicted too.
my son (20 years) and my partners son (23 years). Both have recently bought upmarket mobiles (I-Phone and a Blackberry Curve). Both have said that they now use their mobiles more than their desktops. And both have said that they "didn't know how managed before their mobile internet access".
ask them what exactly are they doing with those devices and im sure the answer will sound like what i just said above.
They sure arn't walking around with their credit cards out making online purchases.