Following the iPhone 4.0 event, Apple has now pushed the developer release for the iPhone 4.0 firmware at the Apple Dev Center which can be downloaded for free.
However! it must be noted that a developer release of the new firmware can only be download by an iPhone developer registered at Apple Dev Center and not by any user. Making a iPhone developer account costs $99 a year.
The new iPhone 4.0 firmware brings 100+ features to the iPhone and iPad platform starting from features as amazing as multitasking, to iBooks and the new iAd advertising platform for developers.
Head-on the Apple Dev Center to download the new iPhone 4.0 Firmware on your iPhone and test the new features. Only available for iPhone 3GS and iPod Touch 3G for now.
Update: Now for users/non-developers we have an open article on how to download the iPhone Firmware 4.0 for your device.
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