This is cool:
Across New York, there are USB drives embedded in walls, buildings and curbs. The idea is to create an anonymous, offline file-sharing network in public space. The drives are completely public and anyone can plug in to drop and download files.
Seriously, you can plug the USB drive into your laptop. ...
It's part of an art project called "Dead Drops" by Aram Bartholl and I have to say, it's pretty awesomely creative. I mean, if I saw a USB stick stick out of a random wall, I'd be dying to know what's in there. I'd have to plug in. It'd also be interesting to see what people would anonymously share on the public drive, well, until some jackass decides to upload a virus to screw up everybody's computer.