iMac: has arrived at the FedEx sorting center in Atlanta after its cross-country drive from California. Delivery is on for tomorrow.
iPad: order status shows "Prepared for shipment". According to the rumors, that means it will also be delivered tomorrow. Sometime tonight (they say) the status will go to shipped, with overnight delivery. [fingers crossed]
[added at 9:15 pm] I have a shipping notice! "Estimated delivery Apr 30, 2010 by 3:00 PM"