Avalon should have just done an auction format. Give people a few days to place bids, using 2 of 3 escrow to lock in coins, then take the top 600 bids. They could have a per-customer (shipping address?) limit if they wanted to ensure that the units were spread out.
That would have been nice. And as long as they are evenly distributed -- perhaps 3 per postal code + IP address location, or somesuch.