Are there any programs that will interpret Gregg shorthand on a tablet computer?

I know there are lots of programs that at least try to convert handwriting to text, but are there any that can take pen input on a pressure sensitive screen in shorthand and convert it to text for you? (Preferably Gregg, but I could learn another system.)

It just seems it would be greatly useful, given the huge increase in input speed of stenography over normal writing.