Might be local, or regional--or even too late--but the corporate AT&T store near the Apple Store I bought my 5 from was selling cases for 25% off today only. Same MSRP as everybody else but I didn't mind picking up 2 Defenders for the price of a Commuter, the case I wanted originally. The bad part was they only had about 3 styles to choose from, the Defender, a Speck case and something else that was cheap and rubbery.
If/when Oakley brings out an Unobtanium case for the 5, buy it and enjoy your indestructible phone. Had one for my 3G and it was the best $15 I ever spent. They retail for $30, gotta love my cop discount at Specs :-D