An online friend just told me about three projects involving sending physical objects around to other folks -- via post or carrier. They sound like fun.
1. 1000journals
The1000journalproject is an independent, privately funded social experiment. It is an attempt to follow 1000 journals throughout their travels, to see where they go, and what people do with them.
Nervousness.org is our online presence, where we try experiments in Land Mail (also known as Snail Mail), to see if we can find new ways for people to interact and communicate. We encourage your participation!
As of this minute there are 7981 Nervous People, 6893 Objects (LMAOs), and 34351 exchanges.
and 3. 20 Things Project
The 20 Things project is an online gallery showcasing the work of artists who create limited edition multiples.
The only way to acquire this work is to make work of your own to trade.
Art swaps are organized at irregular intervals, in groups of 20, at the whim of the site organizer.