I find the IPad to be a great piece of hardware that is easy to bring along and that has an intuitive touch interface. This would make it an ideal platform for many cognitive tests such as n-back. As the IPad seems to have a short response latency (observation based on the plethora of music aplications available) reaction time tests should also be able to work ok.

My question is: Are there any cognitive tests, or test suits, available on the IPad (and possible the Iphone).