How Fitness22 is making 'millions of dollars a year' selling iPhone apps with no marketing

In the tight-knit startup community of Tel Aviv, Israel, a lot of people are talking about a tiny company called Fitness22. It's been raking in big bucks selling iPhone apps. The company makes about a dozen (so far) fitness apps and charges $2 to $6 apiece for them, plus offers them in bundles for $9 …