Postcrossing

About
Postcrossing is a project that allows anyone to receive postcards (paper ones, not electronic) from random places in the world.

How to participate?

 * 1) register to get a login
 * 2) obtain an address and a postcard ID
 * 3) mail the postcard
 * 4) wait to receive a postcard from another postcrosser
 * 5) register the postcard ID of the card you have received
 * 6) go to 2

Map
http://imgs.postcrossing.com/maps/travellingPostcardsMap-small.png

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