Apple has just released iOS 4.2 for the iPhone and iPod touch, as well as the iPad. The update brings multitasking, folders, Game Center and the Unified Inbox, as well as 100 other features, to the iPad, while giving AirPrint and AirPlay to all of the devices. There are also 100+ other improvements.
But what are you waiting for? The 624.3MB download is available now.