Yes you can get Nav with the RB1 radio, however it is not a state of the art nav sytem, and for the approximately $1500 option price you could get a really nice state of the art aftermarket unit.
The wing is adjusted manually and it is recommended you do not touch the settings as they are set to maximum effect and the balance of the car front to rear could be dangerously affected if you messed with them. Only the most ultimate track rat would want to touch that adjustment and that would be way after he got done tweaking all the suspension settings for whatever track was in question.
And yes, they have been taking orders for a long time. Indeed the 08 allocation is sold out, and 08 production will run long into this year, so if you want an ordered car rather than the very rare one that might be on the ground now (I only know of one and I'm not sure if it's seriously for sale or the dealer is keeping it for himself) I suggest you get your order in right away. My guess is that you might take deleivery on an 09 early next year if you are lucky and only if you go to one of the larger Viper dealers like Woodhouse who can actually get these cars.
Your best bet might be to call Bill Pemberton at Woodhouse and hope you can get on a wait list for a canceled order if you want one any time soon.
Ford Chrysler Dodge Lincoln Mercury Mazda Nissan - Omaha Nebraska