"You can insure air 
mail (and I assume global priority) but there is 
no way to track it."

According to my favorite post office (open to 3pm 
on Saturdays!), you can track Global Priority - 
but the only place you have the tracking number 
is on your receipt!  So you've got to keep that 
long strip of quickly-fading paper very safe, and 
make cross-references!