I will be traveling quite extensively and internationally for the next year. To help keep my young toddler occupied during these trips, I've been looking into portable DVD players and other options. It seems like the iPad may be the best option, because of the different activities it can potentially provide. My question is, should I buy the WiFi or go for the WiFi + 3G? I know I can use 3G in the US, but after August most of my travels will be to Asia and back. Will it even be useful? Or should I just hold off and keep him occupied with the laptop and movies?