Well, this plugin was pretty neat enough to make me want to create an account here just so I can drop my two cents worth.
Two things would make this plugin totally awesome: A way to make polar ice caps and a way to make cratering/scarring; craters are pretty much self-explanatory to the fact that most any planet, especially with no atmosphere, would have some evidence of a DISTINCT crater while scarring, on the other hand, would apply more to frozen planets that are like sheets of ice and any meteor hitting it would create either a scar or a glass shattering effect. At any rate, just simple cratering would be neat to be able to do so as to make kewl cratered surfaces.