At the Apple event currently underway at the Apple headquarters in California, the gathered crowd has been shown the next version of the iPhone’s operating system and it will include multitasking – Apple style!

It will be operated by a double click of the Home button, which will show a window displaying all apps running at that point, and you can then move between them.  The demonstration of this new addition continued with Scott Forstall, the Senior Vice President in charge of iPhone Software stating that there will be seven multitasking  services including background audio, VoIP, background location, local notifications, push notifications, task completion and fast app switching.

The demonstration of multitasking also showed a version of the iPhone’s familiar homescreens with wallpaper behind it, another new feature set to be introduced along with Bluetooth keyboards, a 5x digital zoom, tap to focus video, more Nike+ integration and SMS/MMS search amongst others.

Today’s event was billed as a Developer Preview and customers won’t be seeing iPhone OS 4.0 until summer this year, when we presume it will also occupy a new iPhone.