It will suffice until Broonie comes up with something better.
It tells you whether the server is working as well as how many people are currently playing. If the server is full, it will make a *ding* noise when space becomes available.
It's working off the same data that the live cartograph is running off, and is requesting said data at the same rate as the cartograph does, so should not add any extra strain to the server. I am aware that I did not ask Broonie's permission to make this and will gladly remove it upon request.