I want a custom calculator that has all the features (including a GPU, ARM7 processor, possibly 3D display (like HTC Evo 3D), WiFi (yes, SATs don't restrict Wifi!), SD card slot, camera, Android or Ubuntu compatible ... maybe OCR problem-solving?) possible except these by default (requirements for SAT, I'm surprised how easy it is to have an acceptable calculator ):

Calculators with QWERTY (typewriter-like) keypads (just switch the W and the Q to make it a WQERTY keyboard to make it easy to type but allowed at the same time)
Calculators that contain electronic dictionaries (doesn't mean disable potential for dictionary, user's responsibility)
Calculators with paper tape or printers (Allow network printing could work though)
Calculators that "talk" or make noise (headphone jack ok/slot to put internal speaker in)
Calculators that require an electrical outlet (Meaning it needs battery lasting for at least 48 hrs strait with display and simple math, underclock when not using android OS)
Cell phone calculators (as long as it's not a cell phone, it's fine)
Pocket organizers or personal digital assistants (As long as it's labeled as a calculator, it's ok)
Hand-held minicomputers, PowerBooks, or laptop computers (As long as it's labeled as a calculator, it's ok)
Electronic writing pads or pen-input and stylus-driven devices (the Sharp 9600-EL can be used without the stylus) (finger touchscreen is ok)

So how can I encourage such a project, or will I have to build it myself?
It might be fun to create, maybe I'll give it a shot!

You would have to probably start the project yourself, and make something to show. Perhaps a proof-of-concept of some sorts. Generally if you can convince people that your project isn't going to die or fail, people will become interested and some will help.

But ultimately, you would have to start building it yourself and bring in other people who could help.

Actually it's generally better that the project doesn't get officially announced until it's close to completion or at the very least almost fully functional. Otherwise it creates a lot of false hope and hype if it fails. Asking for advice and help is a good idea, though.

If you studied in electronics and/or engineering, it will help a lot. You have to decide which parts to get (display, keyboard, peripherals, etc.), of course no QWERTY so it's allowed at the SAT (they will accept it if you're switching 2 letters? You're better ordering them alphabetically to maximise th chances.), then how to assemble them correctly, then how to assemble a lot of them. Good luck

If you want a calculator for the SAT you really don't need all of that.  The math portion of the test is pretty easy and can be done with a scientific calculator if you wanted.  If you want a calculator with a CAS then get the Nspire CX CAS or the TI-89 Titanium.  TI dominates the calculator market and it will be hard to get teachers to accept a new calculator since they are so hooked on to their TI-84's.

It would be nice to have something like this but it's hard for old teachers to accept new tech. 

There are also other keyboard layouts other than QWERTY that you can use instead of just switching two letters if you want.

yeah but creating such a calc just so you can have some advantage on SAT? SAT maths are easier than pre-calc final exam. The idea might be great, but I think the motive is wrong.

Tests really aren't about getting an advantage, they're more for showing what you know and can produce on your own. Actually, one could argue that if you possess the knowhow to create such a calculator, you really wouldn't need it for those tests.

(Also, the tests are easy)

You know, I never took my SAT's :'(