Open Source Graphing Calculator

Really less of a dedicated calculator platform and more of a handheld linux computer with a touchscreen interface.

This graphing calculator is built using a beagle board a particularly well apportioned open-source single board computing platform.

I personally wish for a calculator with gigahertz class processing (like the beagle board) and easy to use software (like the ti-89).

Not that a format like a kindle or i-pad wouldn't work just fin. It's simply a matter of the software.