I made a nice keylogger out of a 32MB flash drive I snatched for .50 cents.
It has a professional keylogger app set to autorun, and once it's plugged in, automatically installs itself to a hidden location.
Then It will automatically send key reports every hour (you can set the time duration) to a POP3 Email account I set up.
Worked brilliantly, I also have a link to the app installer online, so say, I'm at one of those shop and stop kiosks where you apply for a job, Haxored. Then you can get info Like peoples SS and stuff,
It also worked at school to get teachers login passwords for the grading application.