First up, there's news that multinational computer company Oracle's CEO Larry Ellison has stepped down. Or stepped sideways, really. He'll now be the chairman, replaced by two CO-CEOs, Safra Catz and Mark Hurd. Plus, the anticipation has been building for weeks over Alibaba's IPO, from a massive road show, to price changes, to plenty of speculation on what's looking like the largest IPO ever. The Chinese Online Retail Giant's adventures on the market today represent complicated seas for adventurous investors, but also some potential big changes for another tech company that is already invested...we're talking about Yahoo. Santosh Rao is head of research at Manhattan Venture Partners, and joins us to discuss. And how well have you kept up with the week in tech news? It's time for Silicon Tally! This week, host Ben Johnson takes on Jennifer Pahlka, the founder and executive director of "Code For America," and recent Deputy Chief Technology Officer for the United States Government.