I've used bodyguardz on my 3G and i LOVED it. it did not have an orange tint ant was very durable. It was a bit hard to fit perfectly on the back of the phone, which is why the edges tended to lift a bit but that wont be an issue with iP4.
I was thinking of ordering bodyguardz but after reading that ip4 is made of aluminosilicate glass on the front and back, and then watching engadget take a pen to the screen with no damage, I'm waiting on the films.
I likely will get a white bumper to go w/ my white iPhone... I wonder if other companies will be able to make bumpers similar to that of Apples.