Today, Apple announced the iPhone OS4. This new operating system for will bring over 100 new features. It will ship with the iPhone and iPod Touch starting this summer and later in the fall with the iPad. For developers, the new software development kit (SDK) will offer over 1,500 new APIs. The developer API beta is now available.
The major upgrades include mutitasking, folder organization, improved eMail (including support for multiple exchange acocunts) iBooks functionality and more secure enterprise support. The new OS4 will be compatible with iPhone 3G, 3GS, second and third generation iPod Touch and the iPad in the fall.
This announcement adds fuel to the fire around speculation of a new iPhone to possibly be released this summer, perhaps for Verizon. Of course, lets not forget the multitasking capabilities already available in Android phones.