Paul over at Modaco http://www.modaco.com/index.php?showtopic=235176 spotted this very useful Key Ring

It's essentially a USB to Mini USB device on a key chain so you can charge and sync your device wherever there is a Computer with a USB port!  No need to carry cables anywhere!

You can buy them here for $5 each! http://usb.brando.com.hk/mini5pinkeychain.php 

I've just ordered a load!