I am only going through this life once and I have no intention on getting rid of my Bonneville for gas reasons only. When I decide to trade it in it will still be for a luxury car and not a rice burner.
If anything, a bonneville would be on my list of cars TO get when gas prices get insane. Don't think there is a car made that gives you more bang for the buck.
The truck, heh, well, the truck isn't going anywhere, but more likely, it'll just become the second car...and it'll have a car cover and only driven when necessary. Hopefully that'll be sooner than later