At any point of your trip you can connect your GPS to a computer in an internet cafe and send route back home as backup (ZIP greatly compresses the logs for e-mailing). As 60CS has option in menu to work as USB mass storage device, it will be presented to the computer as usual disk from where you can copy logged tracks in GPX format (if you have enabled track logging to the card). Not as easy with your waypoints, though, but these are saved in internal memory of GPS and not on cards anyway. As prices of cards are very low nowadays I'd take 2 gig one (avoid accelerated Sandisk Ultra II cards as they are known not to work in this GPS device).
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