I bought orange since I had that on my 3G...and it is my company's color....and just got an email overnight from Apple saying they refunded my money since I ordered it through their site a few weeks ago. Woo hoo.
They really are handling this part of things really smoothly it seems. I've never known and instance of a company being so proactive with refunding people. Filling out a form online for your refund would seem the standard fare for this sort of thing, most companies would probably do it this way, and it wouldn't be out of the ordinary. It's nice they're stepping up to make this as painless as possible for people.
I wear mine naked but white on black (or black on white) looks pretty sweet. Black would be the way to go if you want to make it least obvious that it has a bumper.
I got the white bumper a few days ago and it looks clean on a black iphone.
I got the black bumper on release but didnt like it so I gave it to my brother.
I thought I prefered the white until I actually got it & used it for a few days. It has too much grey, IMO. Kind of ruins the clean cut look that I was hoping for.