Viewers using Viggle to check into the Grammy awards that aired Sunday got a surprise. Bing, integrated into the experience, allowed users to interact with real-time trivia, polls and voting related to programming, as well as search on the engine to help viewers find information about artists and events. Chris Marlowe said the app has been downloaded 140,000 times since the Jan. 25 rollout, and users average 70 minutes per session each time they launch it.