It seems like Amazon received a small initial shipment and those who got in early had theirs shipped. Based on the availability from the Apple online store, it might be a month or more before Amazon may get another shipment of MBPs
I checked JR.com and they have them in stock. YMMV though http://www.jr.com/apple/pe/APP_MC975LL_SL_A/
At this point, Apple seems to be sold out everywhere (Apple Retail Stores, Apple.com, Best Buy, etc.) and I was told by Apple that they are backordered 3-4 weeks. I don't know about Amazon.com's receipt of additional orders but I can imagine Apple would sell through themselves first before giving to other retailers. With that said, everyone I've spoken to at Apple has said the fastest way to get one is through their online store.
I ordered Thurs June 14 at 9:30pm est and the status is still "not yet shipped" ... can other people who ordered earlier than me and have gotten theirs already post when exactly they ordered so the people who are waiting have a better idea when we can expect availability. Thanks.