Used stamps exchanges.

I have created another project similar to this one.
You send a surprise to a random member and you receive a surprise back!
It's for those that like snail mail.

http://youvegotmail.club

I have build this myself.

That's a good idea :)

By the way, is this website free or any special CMS?
I'm asking this because I would like to have a website like this one, but with japan themed.