Probably some of you have already seen Prezi, an web application for
"non-linear" presentations. That doesn't sound too clear, but see
http://www.prezi.com for an example, or http://www.aether.hu/prezi for
an introduction. It basically breaks the traditional slide-show format
of presentations and turns it into a fancy dynamic
flight-simulator-like concept. Very refreshing and ubercool after
years of Powerpoint slides :-)
As far as I know, there is currently no other software doing something
like this. But IMHO, Inkscape would be very much suited for this.
Currently, it has the ideal editing tools to compose the presentation
material itself, but it lacks the animation interface to provide the
navigation and zooming aspect in the presentation itself. With all the
SVG animation plans, Prezi-like presentations would seem to be within
reach.