First, if I were stranded on a dessert island, I'd definitely want strawberries & chocolate and perhaps a bit of caramel!
On the desert island, I'd also want an unlimited supply of chemicals and various papers (not to mention some heavy-duty de-salination eqipment). Ok, now that we have basics taken care of...
I'd bring my 28-105, I'd want one of those way cool fish-eye lenses (24mm), and a 100-300.
Please tell me there are no snakes on this blasted island (if they eat my chocolate, they're history)