I miss IRC... or what it used to be.
But yeah, I would keep it as light as possible. Include the hooks so people can expand on it, but if your aim is simplicity, it should be exactly like this and let users create what they want on top of it.
The only thing I'd have to offer is that you might want to add the total member count as an option to be viewable or not. Some forums display that and some don't.
Also, since you added member profiles, the newest member should link to their profile.
That's about all I'd add to it.