Apple will release the iOS 4 update for iPhone and iPod touch owners later today. The iPhone 4 might not be in stores until Thursday, but existing owners can take advantage of the new software features coming to the new device in a few hours.iOS 4 is a free update and is compatible with iPhone 3G and iPhone 3GS models, as well as second and third generation iPod touches. Multitasking will only work with the iPhone 3GS and third-generation iPod touch, however.
mashable.com has the announcement.
