I developed several iPad and iPhone apps for Morse Code that are currently in the iTunes App store. Just updated the HotPaw Morse Decoder app to support QRQ CW decoding for speeds from 40 to 80 WPM. The HotPaw Basic app also includes a command to play Morse Code sounds at those WPM speeds. There's also a couple Morse Code training apps. My MorseKey iambic keyer app is free, but I haven't updated it to look nice on the iPad yet.
http://www.hotpaw.com/rhn/hotpaw/