We've previously talked about Evil Mad Scientist Lab's Eggbot machine and while decorating eggs is certainly the main purpose of the Eggbot, it's not the only thing you can do with the great device. In fact, you can actually use it for decorating pumpkins and if you have the ostrich egg version, you can even decorate full-size pumpkins up to 6" in diameter (the original Eggbot only can handle pumpkins up to 4" in diameter). They even have a great blog post showing exactly how to do it.
Of course, if you prefer to limit your Eggbot for only eggs, you can always turn your eggs into adorable little ghosties like these for Halloween.