>There were several free apps in the top-grossing list last time I checked. Okay, how many of them are making a serious profit? How many are breaking even? How

>There were several free apps in the top-grossing list last time I checked. Okay, how many of them are making a serious profit? How many are breaking even? How many are profiting primarily due to an existing customer base? (I'm thinking of Pandora as an obvious example; they're making money off of Apple's platform, but they were making money before they wrote an iPhone app.)