I ordered my 21.5 model on release day, and all I've got so far is;
Shipped to: ***** G.B, 30th July
Estimated Delivery Date: 6th August
Current Delivery Status: In Transit to Customer - Shipment on Schedule, 3rd August
(Its worth noting that this date has changed every day, ie 1st Aug, 2nd Aug, 3rd...)
No tracking number, no carrier. Hmmmm.... 😱
EDIT: I've discovered something rather interesting. The U.K and U.S Apple Store sites both show different information regarding your Shipping. I've just logged onto the U.S site instead, and now it shows the courier my items are shipping in - for the iMac, its "Kuhne & Nagel Spedition s.a r.", and for the iPod Touch and AppleCare, its "Syncreon Technology" . All shipped on July 30th apparently.