Apple issued an update to iTunes today—iTunes 10.1—which adds the new AirPlay feature to the service. AirPlay is the ungraded version of AirTunes, which now allows users to stream video and photos from their iTunes-enabled device—computer, iPhone or iPad--to a TV set equipped with Apple TV. Music streaming was already supported in AirTunes. However, to do so, Apple still needs to update the iOS operating system on these devices to the pending iOS 4.2, which is expected sometime this month.