JomSocial, the community component for Joomla, will soon get chat functions. JomSocial is in use on a lot of sites, among them the popular people.joomla.org - the official Joomla! community site.

Later this month, Azrul will release a chat add-on for JomSocial called SookaChat.
The extension will enable users of JomSocial powered sites to chat directly on the site.