A while ago .. Andi did an April fools on Digideep .. The info is here.
Oceanic are making it a reality now .. and i think it's pretty cool.
Wouldn't it be col though if at the very least we could get this working and showing us the LCD panels display so we know what settings we are on and how the exposure is in general .. I know it shows it in the viewfinder .. but it would be a start to haviing TTM viewing ... Through the Mask .. imagine being able to point the camera and see the viewfinder in your mask !

I think it has some great uses available .. but not thought of yet .. and couldn't be too hard to make happen really.
Source: http://www.oceanicworldwide.com/p_computers_iddm.html