Just like to promote my game a little if I may?
It's my version of a Mahjong Solitaire game for all devices running iOS3 or later. As it's a universal application it will run on the iPhone (3&4), the iPod Touch and of course most importantly the iPad.
There's a whole load of levels of varying difficulties that should take some time to complete . Not all are available to start with though and the rest will need to be unlocked.
More info about Mahjong Madness can be found on the iTunes site & at the usual place on the App Store (Games - Puzzle).