Apple still shows a 3-5 week wait on the new Retina 12-inch MacBook across the board but one US retailer has them in stock and shipping in certain configurations. Best Buy, who also offers a $50 off coupon for people with access to an .edu email address offers the base model MacBook in both Silver and Space Gray for delivery May 18th.
Other US retailers don’t have them in stock but offer discounts and state tax advantages:
As for Apple, we’ve reported that its official stores are now receiving limited SKUs ahead of widespread, global availability at the end of May.