Just discovered this while I was looking for material to add to the page on designing a presentation. And it is one of the neatest things I have come across in a long time: Prezi! This is an online presentation platform with which you can make zoomable presentations where you can zoom into and out of your input material with your mouse wheel. The whole canvas may rotate to zoom into the element that you click on (depending upon the angle at which it was placed), giving you really great screen animations as you wander around. And furthermore, all this can also be viewed as fullscreen.
I am not putting any screenshots here since this thing really does need to be seen in action. Register immediately (a nice free plan is also available) and check it out for yourself, would be my advice… ;-)