-keeps external battery upgrade possibility (Mugen or homebrew)
-keeps HW keyboard (against Elop "cripple the N9 to be as incomplete as the future WP7 devices" -doctrine)
-keeps resistive screen
-keeps Maemo 5
-adds integrated geiger-counter
-adds a cigarette lighter and a compass
-makes it shock and water-resistant
-adds a megaphone function

Improves the general HW specs a little so that Maemo 5 finally flies.

I am willing to pay 1500 USD or todays equivalent in silver coins