50 million iPhones sold + 35 million iPod touches = 85 million iPhone OS devices
Steve Jobs reported today that Apple had sold 50 million iPhones and 35 million iPod touch for a grand total of 85 million iPhone OS devices on the market (okay, 85,450,000 including the iPad).
Jobs said this was a great target for developers. He's right. No matter how many complaints there are about iPhone OS and Apple's stewardship thereof, that's a tremendous install base of devices that can pretty much all run the same OS (give or take a few features here or there) and same apps.