I've found them horribly useful for passing authentication tokens from desktop to mobile devices. It means that you can move tokens without having to type enorm

I've found them horribly useful for passing authentication tokens from desktop to mobile devices. It means that you can move tokens without having to type enormous screens or go through a normal login form. They're even pretty if you embed them with a bitmap using QArt — http://research.swtch.com/qart http://research.swtch.com/qart