at first: this app will NEVER reach the appstore, so apples restrictions are eglible. the app should only be for demonstration purpuose, but i want, that no mean person playing with the device can delete it. some apps in cydia show, that it is possible.
second thing: i did only read something about the os4-features, because until this time there is an ios4-problem with this project. but: can i write the software so, that it ignores the homebutton completely ? so that the customer doesnt get the chance to play around and can not get off the software (until he finds maybe a gesture or sth like that).