“It’s kind of a gold rush,” says Brian Greenstone, who runs a tiny outfit (it’s just him and a few freelancers) called Pangea Software in Austin, Texas, that has created several hit games for the iPhone, including Cro-Mag Rally and Enigmo. Greenstone, 41, has been writing games for Apple’s computers for 21 years. But he says he’s never seen anything like the iPhone apps phenomenon, which this year will deliver $5 million in revenue for him. “It’s crazy. It’s like lottery money. In the last four and a half months we’ve made as much money off the retail sales of iPhone apps as we’ve made with retail sales of all of the apps that we’ve made in the past 21 years—combined.” Business is so good that Greenstone won’t even bother writing for the Mac anymore.