With the iPad fresh in the hearts and minds of consumers, Apple plans to introduce the next evolution of its iPhone OS. The company today that Apple would launch the next major revision of iPhone OS along with an iPhone HD on June 22. That's still likely considering the words "sneak peek" -- this week's gathering is presumably nothing more than a demonstration. Apple's iPhone OS 4.0 is expected to bring multitasking, and possibly even a file system that lets users save and open documents from outside of a particular application.