The new version of the iOS that was presented at Wednesday's conference in San Francisco, will be available for download on Wednesday 8th of September.
The bug fix version 4.1 will be available for the iPhone 3G, 3GS, 4, iPod and iPod Touch. The main novelty in the iOS 4.1 is primarily the improvement of the productivity of older iPhone 3G, the introduction of Game Center, HDF photos, the ability to rent movies for 99 cents from the U.S. iTunes Store and sending the recorded videos in HD through WiFi (iPhone 4).