The Marlin Chat Box is only available to registered users of the site.  To have access to the chat box, simply log in. 

The chat box is a Flash-based product, so you will have to have install the flash player. Visit http://www.macromedia.com/go/getflashplayer/ to download this for free.

Once you have flash installed, click the chatbox to activate it.  In the lower textbox enter your username and click send.

Once you've done that, you'll be able to type and chat.  The allowable message length is short, but this is only a temporary test.