We'll be taking an extended trip to Paris, Amsterdam and Norway this May/June and I'd like to find a way to easily back up my CF cards. It's not uncommon for me to go through a 16Gb card in an afternoon. In the past, I've gone the laptop/external hard drive route, but on this trip I'm planning to take only my iPad. Is it possible to daisy-chain to an external drive from the camera/CF card, using the iPad as an intermediary? I'm also open to other ideas.