Talking Biz News: The Wall Street Journal has launched “What’s News,” its first mobile-only app for iPhone, named after the newspaper’s front page “What’s News” digest. Available exclusively for Journal subscribers, the iPhone app delivers the 10 most important business stories updated throughout the day by a team of journalists in New York, Hong Kong and London. “What’s News” is designed for mobile use with articles as well as a real-time view of major market data.