The Postcard Crossing Project has been around for about three years now, but I just stumbled on the Web site through another artist's blog (thanks wackystuff!).
You sign up to send and receive postcards from people all over the world. One member just received his 1,000th postcard! The site is trying to log 2 million received postcards and is about 23,000 shy.
I just signed up because it sounds like fun -- and it's so much better than getting only bills in the mail!
Check it out:
I also put a perma-link in my right-side column.