I put this up in March and it resulted in endless and unending internal server errors, which persisted even after I took that feature down. (This also means that it wasn't the only culprit.)
However, this server is more robust, plus I have more control over it. We have not had any memory problems, so I will once again give it a shot and put back the Facebook-like IM chat. Look for it very soon.
I do have a concern that it could crash radio (as it did to DD), so maybe I'll run a test by doing a +EV show soon.