Newyorker, Sabmas: From what I gather from one of the girls who got the A380 email here is that it comes just before you get your visa and ticket (so 1-2 weeks before DOJ)... I also am not sure if it is based on your home as A380 doesn't fly to Singapore...You can always change after a year or two, to A380.
Beaverfly: I have heard of tickets coming just before (3 days) you are supposed to leave. The group who went from here already got their tickets about 12 days before but they had their DOJ changed by 2 days... As long as you have the visa your fine, the ticket will come!