|As others mentioned... I think the interactive maps could be very cool, if only they resized. I've never done any Flash development, but I was under the impression resizing Flash applications was pretty straight forward...
Yes and no. Scaling vector-based images up and down in size? Trivial. But note that generally a map application like this is using fixed-size JPGs or whatever, not actually 'drawing' the map inside the program. You can still do it by, say, using multiple maps at different sizes, or doing image scaling, but it's not quite as simple.
Dealing with a dynamically changing viewport/window size? AMAZINGLY difficult because of the way Flash is set up.
A well-designed interactive map should be unilaterally better than just a big image file -- at worst, it should let you turn off any overlays and look at the map just like you have a big zoomable image file.
Many, however, are not.