How about an indexed, full-blown, hands-on demonstration DVD of all, and I mean ALL, the keyboard's capabilities. The time saved in fiddling about and frustration would be enormous and make the product far more attractive to the prospective buyer.

Manufacturers spend large amounts on R&D, so to spend a bit more on putting together such an obvious aid, I think would tip the scales for someone who'd love to buy a keyboard, but is intimidated by the technology.