Australian retailer Mobicity has sold out first shipments of Lumia 920 pretty soon and it was not even able to meet the pre-orders. In fact the devices is shown sold out on their website and they are taking orders now for a later delivery.
On the device page they wrote that,
UPDATE 8th of November: Shipping has begun with our first batch going out yesterday. However due to high demand the quantity was not enough to fulfil all pre-orders. New stock is expected over the coming days although supply is highly constrained, so order now to reserve stock from our next allocation.
Also they mentioned on Twitter that the interest was so high on 8th of November (the day when they got the first shipments) that their servers were crashed and they needed to restart it.