AppleInsider is reporting today that they have found more evidence of multitasking support in iPhone OS 4.0. According to the report, multitasking on iPhone OS 4.0 will be very similar to the Expose functionality found on Mac OS X.

Those familiar with the design of iPhone 4.0 said that the user interface will resemble Apple's desktop Expose feature, in that a key combination -- reportedly hitting the Home button twice -- will trigger an expose-like interface that brings up a series of icons representing the currently running apps, allowing users to quickly select the one they want to switch to directly. When a selection is made, the iPhone OS zooms out of the Expose task manager and transitions to that app.

Reports of multitasking on iPhone OS 4.0 have been rumored for a while now. However, a recent report showed that multitasking is coming to iPhone OS 4.0.

Apple currently offers developers an option of using Push Notifications, the ability to send messages to the user without having the actual application open, to replace multitasking. Push Notifications was introduced in iPhone OS 3.0, which was released last June.