"Our interview this morning is with David Sacks, CEO of Geni.com, an online family tree and social networking site, as well as Yammer, the instant messaging startup spun out of Geni.com at TechCrunch50. David has a unique perspective on the Southern California technology environment, having been the COO of PayPal before its acquisition by EBay, and having had the full Silicon Valley experience. We sat down with David to catch up on what Geni and Yammer are doing, plus got his insights into entrepreneurship and the Paypal mystique."