sentences:  Populous returned on May 6 with new plans, which were unanimously approved by the City Planning Commission.The Penguins have contacted the Pittsburgh Technology Council, which includes 1,400 businesses, in order to find new technologies to implement into the arena's design.On demand replays from touch-screens will be available in luxury suites, while "Yinz Cam"—a system developed by Carnegie Mellon University students—will allow any fans to view instant replays from multiple angles on their cell phones.