Japanese language support for Siri (availability may be limited during initial rollout)

Photos can now be deleted from Photo Stream

Camera shortcut now always visible on Lock Screen for iPhone 4S, iPhone 4, iPhone 3GS and iPod touch (4th generation)

Camera face detection now highlights all detected faces

Redesigned Camera app for iPad

Genius Mixes and Genius playlists for iTunes Match subscribers

Audio for TV shows and movies on iPad optimized to sound louder and clearer

Podcast controls for playback speed and a 30 second rewind for iPad

Updated AT&T network indicator

Addresses bugs affecting battery life

Fixes an issue that occasionally caused audio to drop for outgoing calls