I'd hope that EE would fore-fill the original orders before advertising more stock for a second wave.
If EE can't fore-fill the initial wave yet advertise more availability then EE really have stretched (I'd suggest broken) a number of moral rules in regards to selling. I really hope I don't get a 'sorry theres a delay' between now and the 15th December. Even with mega ordering going on, if EE does have stock I'm amazed its taking 15+ days to deliver them when as a business their used to delivering high value, on mass items such as iPhones @ launch, etc... I'm hopeful, but as each day passes, I do become more skeptical.
