Are you a Londoner so taken with the Galaxy S III that you want to pre-order one before you've even held an in-store dummy unit? Samsung wants to give you a little something something for your eagerness: namely, Olympics tickets. The first 50 who pre-order the giant phone and pick it up at the Westfield Stratford City store on May 29th will get free passes to watch the home team run and leap its way towards a few medals. If you're hoping to claim the reward, though, be prepared to get into the kinds of lines that Samsung skewered in ads just a few months ago. Customers a