Apple has arranged an event to announce the latest iPhone OS 4 at Apple’s Infinite Loop campus in Cupertino to give all the Apple fans a sneak peek into the future of iPhone OS.

I’ve given the links of the tech media blogs who was covering the iPhone OS event live from the Cupertino, but if you was not able to catch the live keynotes or want to see Steve Jobs delivering iPhone OS keynote, then you can watch the full official keynote streaming video uploaded by Apple, link given below.

The iPhone OS event video is available in QuickTime and MPEG-4 formats. You can watch the video online by going here.

In this event Apple has announced the latest iPhone OS 4 which brings lots of new features and enhancements including multitasking for both users and developers, but multitasking won’t be available for original iPhone, iPhone 3G,and older generation of iPod Touch.

They has also announced top seven features, and released the iPhone OS 4 beta firmware for download. You can watch the multitasking video here. iPhone OS 4 will be available for iPhone in Summer and for iPad in Fall later this year.