Is the coolest Windows Mobile smartphone around coming to AT&T? Showing off their XPERIA X1 at CeBIT in Germany, Sony Ericsson may have inadvertently started a tidal wave of speculation as to the US home of this 3G bad-boy or simply let the cat out of the bag.

AT&T have added a number of Sony Ericsson devices in recent times, will the XPERIA X1 be next? Guess we’ll just have to cross our fingers and wait and see which shouldn’t take long according to recent reports.