I just got done with a trip on AA 777 where I used the Belkin 60 W inverter with my Dell and had no problems whatsoever. The thing worked great and I was able to keep working for longer than I would have had I only had battery.

I guess the electrical demand would just skyrocket if they offered it on every seat on every plane but it would seem to be almost a necessity in the future if you want to attract and keep the business traveller, especially if they end up offering in flight Internet access.