I love the idea!
As a teacher I see numerous opportunities here.
There are some problems though.

There should be a full screen option, and there should also be an option for using two monitors. Showing the questions to the class, while I have "control" from my iBook.

I thought I could give it a try with my class, but the issues I have mentioned above, must be looked at first.
But if the minor "hiccups" is fixed, this would be super. I would actually pay for a program like that.

Thanks.
Paul from Norwaty