Youtube user jaketechwizard just uploaded two video claimed to be two beta of iOS 6: Build 10A010 and 10B24. According to the demos, iPod Touch will support Siri, the iTunes Store and App Store will be integrated for iStore, and as rumors said, iOS 6 will no longer have Google Map any more, and relaced by Apple's native 3d Map.
Watch the videos for more info:
iOS 6 Beta (Build 10A010)
iOS 6 Beta (Build 10B24)
The videos were demoed with iPod Touch, we might see more features of iOS 6 on iPhone and iPad.
Apple is highly expected to unveil iOS 6 on WWDC 2012, which will take place on June 11th. We will keep you updated.