I think that the key to electronics on tour is to keep them low power so you don't need lots of Watts to recharge them. So no Netbook for me. I take an iPhone and a small radio that runs on one AAA battery. The iPhone is my mp3 player, phone, blogging, email and web device. The radio is for all day listening as using the iPhone to listen to radio runs the battery down fast.
I've been thinking about keeping the iPhone charged and I'm looking at a MiLi power skin and a Power Monkey solar charger, or maybe the Surge which is a skin with a battery and a solar panel.