It's really cool!
It's something like a message in the bottle..
You write something and throw it out to the "sea".. Anyone can pick up your message and reply to you..
Most of the users are Japanese.. Or rather, most of the messages that I came across are from Japan..
Some of them can speak English so I was able to sustain some conversation with them.. There's a few with good English too!
If you're thinking what I'm thinking, yes! I'm trying to "fish"! ^^
However, it's really difficult! Almost impossible.. Some of them stop replying or they don't reply at all..
It's sad..