Sony Ericsson has already promised it's entire line of 2011 phones will be upgraded to Ice Cream Sandwich, and now it appears we have a release window for the new software. The head of marketing for Sony Ericsson Italy responded to a customer's question on Facebook, saying Android 4.0 "should arrive by March." Now, that's not an official promise, and unexpected delays could still push that release window back, so we wouldn't cancel our kite-flying plans just yet, but hopefully the wait isn't any more interminable than four months.