Some of the details can be found here: http://www.darkstarusers.com/news/2007/03/30/darkstaruserscom-project-darkstar-sun-game-server-based-chat-now-online/
In a nutshell, it is running on the current 0.9 release and is vaguely MUD/MUSH/MOO/M**-ish. Aside from chatting, you can create/destroy inspect objects and interact in a limited way (dropping or taking items). I believe there are a total of about 15 commands currently. It uses the database custom authentication I posted here last week, so you can see that in action.
I have almost finished adding scripting , and when I get that working, I will be posting a tutorial on how to integrate that with SGS as well. I hope you all check it out, and hopefully hang around!
Oh, one other note, I probably spent more time this week deciding how to write the client than working on the actual engine. I tried various web based techniques with AJAX and such, but I could never really avoid having to do polling, which I felt was kind of gross. I ended up just writing a simple java applet. In a fit of nostalgia, I also wrote a pure telnet gateway which is what I will probably use most of the time.