If you don't know what Ventrilo is, look.

If you know what TeamSpeak is, well, Ventrilo is a free version.

If you don't know what neither of them are, Ventrilo is basically a forum - it has different channels, and they have text and voice chat. So, yeah, it's like a chatbox/forum combination with voice and text.

You first need to download Ventrilo to get into it. You can get it here:
http://www.ventrilo.com/download.php

Then, when you connect, enter your username, and then enter the server.
The server name is Waddle World and the IP is 192.168.254.4.

If you want to use voice chat, make sure you go into the options and set a key to hold down while talking.

Note that the server is on my computer, so it doesn't run 24/7. When the forum description here says it's online, then come on in. If there is a large crowd of people here, the Ventrilo server might be open, regardless of what the forum says.

So, yeah, that about covers it. Questions and comments go into this board, and requests for different channels for the server can be requested here.