question regarding apple keyboard

I've heard that the apple wireless keyboard was made specifically for macs, and that certain keys don't function when used with an ipad. Could anyone tell me which are the keys that don't function?

Thanks!

I can't speak with 100% certainty that they don't do anything, but the expose and dashboard keys won't do what they're supposed to, as those programs and functions don't exist on the iPad. Other than that everything should work the same as the iPad keyboard dock ( not including some of the special iPad only keys that replaced expose and dashboard.

Obviously, eject won't work either.