iPOS (iPhone OS) is now renamed to iOS 4. And a GM candidate will be available today for iOS 4.0
I will try and get more details on all new features being introduced to iPhone 4.
Dave and I are attending WWDC. Some very exciting things coming up! Safari 5 is definitely an improvement as a tool for Mobile app development.
Here is one way:
Though, a long time ago, an Apple WebKit guy suggested this way: