I have been thinking of starting up a campaign, and as the title suggests it would be based on a destroyed planet. The countries have fallen apart and are much like the nation-states of the medieval days. With the crumbling of the major governments, new powers emerged, the few and far between. The days are dark and deadly, though there are those strong enough and possessing the skills (the players) to brave and survive the wilds. A virus, among other things spread throughout the world, altering how everything went and created a new world. Another development, was the resurgence of magic. Making yet another resource for the powers to tap into and wage their wars.
In this world, many things have changed (based off the D&D v 3.5)... Some of which are new powers. New classes (psychic and noble). And new races (yeti - wookie template and lizardmen.)
I have other thoughts and other ideas... And I am even open to many more.
If you are interested or have any questions ask!