User blog comment:DaNASCAT/Technical Update: April 4, 2011/@comment-460966-20110405191819/@comment-876022-20110405200622

Chat was last said to have a guesstimate window for a May release as of previous progression on the extension. Currently, the only place with the up to date module is Sean Colombo's Wikia Dev site. Until then, there is the Muppet Wiki's prototype.

It works, minus server and client side crashes per the timeline on TRAC. I would say it's far past alpha and now it's at a beta state, albeit somewhat closed. That, and you get a nice wrong amount of 6 people in Chat when it's less, more or none and 6 repeating avatars right now. I like it already, too bad it's only on Devbox wikis at this time.