I'm trying out the Macbook for the next 90 days to see if I can wean myself off my Thinkpad addiction. While I'm psyched to be getting a new toy, it looks like I'm SOL finding an iGo Juice tip so I can use my Empower adapter on long flights. The apple site doesn't have anything either. Does anybody know of any alternative to lugging 3-4 batteries with me everywhere I go?