Lacy, citing an internal Slide presentation, says the company ranked ninth in reach on the Web, after Amazon.com, and now has 150 million users for its MySpace slide shows, Facebook apps, and other Web applets. That's an increase of 142 percent from a year ago, when Slide's valuation was reportedly a mere $80 million. A nice trick: Just double your user base, but see your valuation grow sevenfold.