Mine's in the same boat. It sat in Anchorage for 22 hours before getting customs clearance - it finally cleared around noon Alaska time today. I'm waiting for it here in Massachusetts. HOWEVER, I'm not worried about it getting to me tomorrow.. mostly because this is FedEx's business. They ship stuff overnight. The further it goes the more it's likely to cost, but if they say that they can get it there overnight, they do. So I'm not going to freak about whether it can make its way all the way from Anchorage to Massachusetts. I'm just going to take a deep breath and trust them.
Now, if I check the tracking at 9am tomorrow and it's not on the truck for delivery, then I reserve the right to freak.