Photochaining is the latest fad to sweep the nation – and other nations – and it’s really easy and fun. You buy a cheap memory card, put it in your camera, take some pictures with it, and then “name” the card and leave a note telling someone else to take a picture and leave it somewhere else. The results are then posted to Photochaining.com and world peace ensues.

The resulting random pictures are quite engrossing when done right, a cross between PostSecret and geocaching. Cool stuff.