I noticed someone is wanting to buy the B&O Play iPhone case in a forum I can't post a reply :)
Anyway, just a couple of notes:
1) I picked one up last week. The first thing a friend said "oh god, why do you have that on your phone?" and, frankly, people can come across as a bit too brand freaky. He was right. I removed it shortly after.
2) They are free. Your dealer can give you one. No need to be buying them. It's a very very simple and basic case for the reverse of your iPhone. My dealer had a few of them.