re: Huygen's lander imaging-system.
It all depends on the type, quantity and scheduled release of the raw frames :)
I imagine the imaging sequence is probably a dozen or so to complete a panorama - followed by a pause - then another panorama later on - so a more appropriate animation would be to morph from one panorama to the next, decreasing in altitude as you go.
If MEX is anything to go by - it'll be March '06 before we see the raw Huygens frames online though.
I've not seen Cass on the MER forum for somet time - he did an excellent animation of approaching the Columbia Hills - it was superb :)
Doug