The new option for mobile apps to tap into Google Wallet was welcome news to Guy Goldstein, CEO of Pageonce Inc.

WSJ: Google Set to Unveil Tablet at Developers Conference

Yahoo Inc. lured Marissa Mayer from Google in July to become its fifth CEO in as many years.

WSJ: Under Mayer: Boosting mobile, buying companies

Ms. Mayer, 37 years old, joined Yahoo as CEO on Tuesday after a 13-year career at rival Google Inc.

WSJ: Yahoo to Pay CEO Marissa Mayer $100 Million Over Five Years