Armageddon
I just sent a "contact" message to the planets.nu guys... but since it's free... I'm also posting a suggestion here :D
Ages ago, I recall having used some plug-in named Armageddon to abruptly end our games in a spectacular way when all players agreed that the current game was lingering too much, and we wanted to start another one.
I believe that it was the plug-in described here: http://www.vgaplanets.com/software.htm
This is the description taken from that site:
"You are a VGA Planets host and want to end your game in a really brain-blasting way? You love fireworks and label yourself as pyromaniac?
Then Armaggedon is what you've searched for! It will generate a final battle at a definable point at the universe."
I don't know if it's already possible to end games like this in planets.nu (I have not found how, but that does not necessarily mean its not already possible), but if its not...
Then it would be pretty cool to have that feature :D
Thanks!