Do RIM’s optical trackpads offer Accessible Alternative to “Skin” Touch?

It seems RIM’s ‘optical pad’ technology could offer hope for the “touch barrier” that exists with the requirement for skin to touch the capacitive type pads that dominate todays gadgets. Thinking about how your phone’s touchscreen operates, you might assume that the so-called optical pads that have been making appearances on recent BlackBerrys (among other