actually i got my dates mixed up, you have 11 days to get the free case, no you cant pay extra its not a matter of the delivery its the fact they dont have any spare iphones, i guess its a waiting list. the iphone normally has 24 hour shipping when the demand is low, but there is a long wait for the iphone 4 it seems.
i wanted the iphone 4 very quickly also and ordered from the 15th june the first day of pre orders, waiting for the phone was horrible i hated waiting but the days went by so fast.