I was at an Apple Store yesterday and the 15" and 17" MBPs on display were all 2.33GHz. Even if they had sold out of MBPs, why wouldn't they have kept the current models on display? I found that unusual.
My Apple Store has the new ones on display. The demand is pretty high so maybe your store decided to sell theirs instead of displaying them. The only things that have changed are the specs and according to Apple, you can't tell a difference between the new LED displays and the old one.