Hey, PT, nice to see you over here! The 'Terrade' forum? I think you mean Terranuts, Ade's too pissed up on red wine this evening to run a forum!
I see what you mean about the jumpiness you were mentioning, you could always try Virtualdub(free compositing software), it has a nice filter called 'temporal smoother', which blends this type of thing quite well. It also has many other filters like frame doublers and such that you could likely find a use for here.
Nice work, very toony, the clouds seem a bit too realistic in comparison to the rest of the scene but still, very nice.