Saw these a little while back, and finally got around to playing around with them. ARRI has an ALEXA simulator that lets users go through the entire MENU system of the ALEXA. Sony has a similar offering, and both ARRI and Sony's simulators are available for download as apps as well I believe.
ARRI offer simulators for the ALEXA and ALEXA plus. http://www.arri.de/camera/digital_cameras/tools/alexa_camera_simulator.html
Sony's simulator is available as a Remote iPad application that allows operators to control the f65 over a Wi-Fi network. http://itunes.apple.com/us/app/f65remote/id497318839?mt=8
Canon also has C300 simulator for those interested.... http://learn.usa.canon.com/resources/articles/Simulators/c300.shtml?categoryId=229
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