NEW YORK (AdAge.com) -- Major League Baseball has become a large-scale player in the digital media business. It's latest application has hundreds of thousands of users watching baseball games live on their iPhone screens. And MLB.com, its digital arm, has grappled with the question of whether WAP -- mobile web pages -- or downloadable apps are the best road forward to higher digital revenue streams. MLB.com president Robert Bowman discusses his conclusions at the recent Ad Age Apps for Brands Conference.