OK guys, my Nexus is on its way.
Ordered on the 29th (16GB, UK);
Received a tracking email yesterday at around 6am;
My tracking (or consignment) number was not being recognised by the system, took over 20 hours to show any kind of information.
Checked again a few hours ago. Now it shows "out for delivery".
So my fellow geeks, don't panic! Your Nexus 7 should be with you soon. Or so I hope!