I realize this is a stupid question, but apparently I don't think it's stupid enough to stop me from asking... I accidentally broke the volume/ring switch off my white 3GS today, so I made an appointment at the Apple store tomorrow to get it fixed. I was thinking while I'm there that I'd kind of like to switch from the white to the black, if possible. However, if they're just going to say no, I'd rather not even breach the subject. So is it possible for me to request a color exchange? Is there a fee for it if I do? Has anyone ever done this before? Thanks so much in advance.