I have a question for those who have owned the WHITE iPhone 3g since the launch date or for a decent amount of time. I have the black iPhone 3g and I am considering the 3Gs in white. Did anyone experiance any sort of discoloration on the white 3g? Did it become "off white" or even a yellow tint? I seen someone on the bus and his seemed to look like a yellow tint, but I was not close enough to be sure.