Since you could call them to activate the Beta if you had to, I'd try the
same number to try to make sure that the shipping company has your correct
address but you can probably do it here.
I don't know where you're from so you could get a number at the bottom of http://support.microsoft.com or you can ask them to get you to a number for
ordering
@1- (800) 642-7676 or whatever prefix from wherever.
According to Darrell Gorter on the setup group a while back, you can call to
activate the CPP so you should be able to change the address here.