This seriously cool free audio chat program lets you make unlimited free calls worldwide. Paltalk offers the best sound quality of any free telephony program we've tried. There's a good FAQ here to help you get started.
New version offers text chat, as well as group voice chat.
They also offer a free service that lets Webmasters easily set up a chat room on their own page. Delphi also offers customized message boards, as well as free Web sites. You can also customize it to make it consistent with your site. All you have to do is cut and paste a script that they provide. No adult sites.