Me.dium is a window that reveals the hidden world of people and activity behind your browser, showing you who else is on the site you’re visiting.
Me.dium provides two ways to talk to the other people. If they are people that you don’t know, you can post a message on the “Talk” tab and anyone currently represented on your online world can see the message and reply. If they are in your Friend list, then clicking their name opens up a private chat window. You can also add other people to a private chat by selecting their name form the list of other friends online with the “add to chat” feature.