I just ordered a new Air, my plan is to replace my 2010 Macbook Pro 15". MBP is very nice and fast, but simply too heavy for me. I have been waiting the new Air for several months now. Since the Air doesn't have firewire, no ethernet, and certainly will be too slow to transfer using WiFi, what's the best way to move my stuff from MBP to Air, time machine? I do have external USB drive, how to utilize it during the migration?