Hi all,
I've just finished writing a blog post about a method I devised for automated and semi-automated image fitting (i.e. when I need to put or update images into a layout in automated fashion). If you're developing solutions around InDesign Server, this might be of interest:
http://rorohiko.blogspot.com/2011/04/fitting-of-images-into-frames-in.html
Cheers,
Kris