[Inkscape-user] Converting the movement and change of an object into a smooth animation

People,

I have put a note on the developer list for a more difficult problem but I wonder if there is a solution to a simpler bit of the puzzle:

Say I have a first drawing with a short, vertical, straight line and I drag it into a long, horizontal, straight line and save it is a second drawing ie it would be nice if I can have an initial object and a moved / changed object and a plugin or an external program that will be able to smoothly animate the change from the first drawing to the second - is that possible?

I had a look at some of the animation plugins but it is not clear to me that they will do what I want.

Thanks,

Phil.