peHUB Second Opinion 09.15

Stop the Presses! The iPhone 5 will have a radical new design. And it will be very purdy. Mack The Knife: John Mack, Morgan Stanley's chairman and former CEO, will leave at the end of the year, again. Back On: Groupon laughs at broad market volatility and now aims to go public in late October/early November. Robert Sinn: The buy high/sell low market. Checking FB: Does every Facebook user spend 15 hours a month on the site? More Bad News: RIM's profit drops 47%.