How to do visual effects for iPhone? (Plasma / Lava like)

Question

Hi,

I need to create an animated Plasma/Lava like effect, that resembles this image: http://dl.dropbox.com/u/1977230/example.png

but slightly animated.

I have absolutely no idea how to actually do those kind of effects on the iPhone.

This would have to run as an UIView background, with some elements on top. Would that be feasible?

Are there some libraries I should be checking, or should I just try to do this in After Effects and then just play a looped video?

Thanks for your help :)

Cheers, Andre