I used to work for Apple and these are their policies:
JeffTL
Do the Apple stores ever sell their floor models, perhaps at discount when they are no longer representative of products?
Apple only sell their floor models once they are told my 'corporate' to remove items from the floor. They will never just pull something to sell right away. Usually they don't sell floor models until there is something newer to replace what was on display.
As far as pricing goes, there are 2 kinds of discounted pricing: Demo (items that were featured on the floor of the store) & Refreshed (items that are open box, but were returned within 14 days and are still at full operating capacity). Demo tends to be a little cheaper than Refresh, however with some of the 'demo' equipment (for example, over the summer when the new iPod click wheel was introduced, we removed all of the old 3G iPod's and sold them as demo) they tend to be beat up a little more from the wear and tear of life in the store.
Solafaa
Well i think they must have them in the stores i mean whats the point of releasing them without having them avilible for people see them?
Give them a call and see for your self before doing anything.
Floop is right. Apple often announces products, but rarely has them readily available for purchase. The only real exceptions to this have been with the 4G iPod (click wheel) and the new iPod Shuffle. The setup, artwork, and advertising in the store will never change until they actually receive both the 'demo' products and the 'for sale' products.