Touchscreen phone users are discovering that much of the fun in their devices stems from applications — those little nuggets of convenience, amusement and distraction available for download on the slightest whim. A good example is Google’s newly updated Mobile App for Apple’s iPhone, which has been generating a lot of buzz for one main reason: voice search. Want to find the nearest pizza place, showtimes for the James Bond movie “Quantum of Solace,” or the latest Bruce Springsteen video? Google voice search is uncannily accurate.