Looks a little Peter Lorresque!
cool - I have never considered sculpting a pumpkin. Do they keep longer than the carved pumpkins?
I haven't compared, but I wouldn't imagine it makes much difference. You've got more of the pumpkin exposed than a traditional carving, so it might even be less. I think it's mostly dependent on the weather, though. When it's nice and cool out, I've had them keep for a couple weeks.