Currently, Amazon has all of the new MacBook Air models in stock and ready to ship, from $899. The new MacBook Pro models are also listed on Amazon as well, although supply is currently more limited. 2014 versions are discounted.
Meanwhile if you want to get your hands on one today, Best Buy offers free site to store on the new MacBook Pro/Airs which will have stock varied by location. 2014 models discounted.
If you want to save some real money, 2014 models are seeing deep discounts at 9to5toys. At the Apple Refurb store you can pick up some heavy discounts on previous models while extraordinary savings are available at B&H and Best Buy on 2014 models including a student deal that chops the 2014 models down to $750 .