As Apple promised this morning during its iPad event, iOS 5.1 is now available for download. What's new? Well the major items include the fact that Siri can now speak to you in Japanese, photos can be deleted from Photo Stream (finally!), and a camera shortcut is now always visible on the lock screen of the iPhone and iPod touch. Other additions include a 4G indicator on the AT&T iPhone 4S, and optimized audio for iTunes TV and movies to make the audio louder and clearer when watching on an iPad. Download it now!