OpenPGP smartcards

I've been playing with a batch of OpenPGP cards that I got a while back. Very cool. You can use it for secure storage of your normal PGP keys but you can also integrate it with PAM and SSH to use it for securing logins to your computer. Passwords aren't enough anymore.

I haven't got it working with OS X yet but it looks like a pretty straight forward operation to get it setup.

Here is some more info.