A person without diabetes should not be experiencing large excursions in blood glucose, so presumably this device should not be helpful for non-diabetic dieters.
It could have many uses. I'd like to know my exact insulin spike when I drink a coke for example. If insulin spike[1] can be correlated to glucose levels in the blood (which is theoretically possible) then trying to minimize the spike gives you a better chances of never getting diabetes :-)
Isn't that the whole theory behind Atkins and the low carb movement? Some dieters want to minimize their blood sugar spikes. But don't want to prick their finger to test that.
Anyways, I am thinking that these guys WILL deliver a device, but it won't be the miracle in technology everyone is expecting.