Many find paper money comforting and don't trust themselves using technology any more than necessary. I would like to see a paper mode for clients or even stand alone clients that don't display addresses. It won't be used for sending money to remote addresses over the internet, but instead will be used to print, load, sweep, and verify paper bit bills. Standard computer printers could print out a stack to be used like a checkbook. They could be designed to require a key card as well or any other multisignature security device. The top check will have a load and when swept, the value will go to the paper bill below in the series printed. I just see this as a way to remove the geek factor from Bitcoin for the masses.

It would be interesting to come up with a nice template for the notes. They could be printed in bulk without the actual codes in color and sold in stores. It would then just be a matter of printing out a checkbook full of sweepable bills.