Im in the UK. As you said, a First-come, first-serve system would be expected!
I'm in the UK too so ours will ship from Ireland.
I have been planning for a while to buy one but waited until the Apple event so I could see what the Mac Pro was going to be (spec/cost). Previously, I had tried the iMac in the configurator and it said 7-10 days but after the event it went up to 2-4 weeks and then 2 days later back to 7-10 days :S
Delivery on mine is estimated at 8-21st November
Just received my RAM for it today too!