How would you like to challenge someone in the bowling center across town or across country? Not for a match at some later time — right now. It's possible with the XBowling smartphone app. The free app is intriguing for non-serious bowling competition as it let bowlers go against bowlers at other participating centers in real time. Scores actually update as bowlers roll their games. (I don't see how it could work for serious competition because there's no way to have equivalent...