Apple has released iPhone OS 4.0 beta 2 and the most important feature of smooth app switching for multitasking is included in this beta release.
As you all know Apple announced iPhone OS 4.0 in the beginning of April and released iPhone OS 4.0 SDK beta 1 to developers and now beta 2 is also outed whereas the final iPhone OS 4.0 is expected in summer for iPhone and iPod Touch users, and in fall for iPad users.
Watch out the app switching video on iPhone OS 4.0 and enjoy;