Yeah, the 92's shape was great, but too big. It would have been perfect if it had been just the qwerty area, without the sidebar, and a little smaller screen.

A clamshell would be pretty sweet. Maybe you could see if you could buy openPandora cases, and use those! That would be the perfect shape and size, then throw in your own board.

Actually it would be allowed on exams as long as it fulfilled their requirements. The ACT's, at least, is an exclusion-based list, not an inclusion-based one, meaning that while it does list examples that are allowed, it has general requirements that you can apply to any calculator to determine whether it's allowed.

The only requirements:
Non-CAS
It can't be marketed as a PDA or computer, so no laptops or tablets.
No communication Devices, i.e. cell phones, and no bluetooth/Wifi.

Sound must be able to be turned off if present.

Actually it would be allowed on exams as long as it fulfilled their requirements. The ACT's, at least, is an exclusion-based list, not an inclusion-based one, meaning that while it does list examples that are allowed, it has general requirements that you can apply to any calculator to determine whether it's allowed.

The only requirements:
Non-CAS
It can't be marketed as a PDA or computer, so no laptops or tablets.
No communication Devices, i.e. cell phones, and no bluetooth/Wifi.

Sound must be able to be turned off if present.

oh well we in holland use a inclusion list so only those listed devices are allowed, seems rules differ in a other part of the world

I vote clamshell.

EDIT:  like this: but longer, more like a square.

The requirements for tests are probably more strict that what they want to tell you. If you look at their restrictions (CAS, wireless communication, things that make noise, etc.), those things have been implemented in some calculators. They don't list restrictions that don't apply to any existing calcs since the average user doesn't need to do that. For example, the things that are now called animated flipbooks on the Prizm were originally going to be called movies, but that was apparently not allowed, so Casio had to change it. Making a calc without knowing all of the hidden requirements might be very hard if you want it to be accepted at tests.

What I would have problems with is getting wires through the hinge.

not if you section it and bind the sections together. You can get a 2.5 inch ribbon cable down to a 1/4 inch dia. cable that way. I've seen it inside the gateway profile computers, so they can fit their IDE cables all over the place.