I've often wondered, more now than ever, if Kinesis is missing the boat by not having a different theory of an "upgraded model". Something much different than the Advantage Pro, which really is no different than an Advantage but looks great with an iMac due to the silver/black motif. What if they made an additional model, a limited run, super-upgraded version of the Contoured Advantage?
PBT or equal keycaps
Increased programmability (this is coming soon)
Backlighting (this is coming soon)
Addressing the rubber keys (tough solution)
Color styling options
Better foam wrist pads
REALLY DELUX THIS KEYBOARD!
Granted I did some of these mods and others have done the others, but I'm guessing if they made a highly upgraded model with a very modest price bump, it would be a sales tool to get even more attention and sales interest.