Wow - From an animation point of view - particularly for students I think we may have the OS4 killer App here.
I could see how easily this could be used for cell animation painting - working with files as opposed to folders will be so tidy. Can you specify it to work on odd frames or even frames - could you make a selection and can it duplicate that selection over and over on other files/frames and colour that selection acordingly.
For example - I have an animated man. I know that the torso will only move so far in one direction and so far in the other - so if I select the centre of the torso, I know that no matter where the body moves - the centre of the torso will be selected. If thats the case you could just do a batch colour and have all your torso's done with ease. Is it then possible to render the frames out as a .avi or .mov. Specifying the frame rate, codec and res?. Obviously at the start people will have to take there frames in at the correct res - or at a high enough res at the right aspect ratio so at least it could be worked down if need be. Sound could be added etc in any old edit package.
Animo, CTP, Toonz et all - and other cell animation production tools cost a bomb - and I mean seriously funny money. But if Image FX is the right price - and can do all that - well it may be worth my while to invest in it. Anything that can speed up the ink and paint process is a Godsend. Were animators, so we'd rather spend more time doing that :-)