César Rodas

GoChat has great features including:
<ul>
<li>Public group chat and private IM communication</li>
<li>Group Video Chat</li>
<li>No registration! Just add to your blog and your visitors can begin chatting immediately!</li>
<li>Login (optional) with your Facebook, Google Talk or MSN account!</li>
<li>See it in action at http://www.GoChat.us</li>
</ul>

GoChat

GoChat - add Chat, IM and VideoChat to your blog to instantly build a social community among your blog-visitors!

Camamba

This plugin provides a free video chat for your WordPress installation, where each user can watch up to three high quality webcam streams simultaneously. The chat layout can be adjusted to match your site and brand, and you can set up moderator access for your room through Camamba.
Hosting and the flash application are courtesy of Camamba.com. The chat itself is ad supported. Optionally you can enable a “powered by” link, which would be greatly appreciated. 🙂
Remember, this version is a release candidate! Please report all bugs and compatibility issues to webmaster at camamba dot com!

GoChat vs Video Chat