As much as Europe can hope for deeper integration, it doesn't feel that way when citizens get whacked for hefty roaming rates. European digital commissioner Neelie Kroes has got such charges in her sights, telling business leaders that she's planning to push through a single mobile telecoms market before she retires in 2015. She told European Business summit that she had "no intention to retire until [she'd] knocked down all the barriers to a single market," which was her "major priori