spent a few minutes this morning using a service called powtoon. it's basically a flash application that presents a way of creating presentations (or movies) in an animated fashion. after watching a couple of videos, it's actually quite easy to do.
the premise is you have a canvas on which you can add objects of varying types. when you add an object, you're adding it against a timeline displayed in seconds.
the idea is that most objects have some type of controllable egress/ingress. for example, you can make things fade in or move up or down. you can add effects like having a hand show up and pull the object away.
it's a bit limited in what you can do... but it's a really cool start. sign up for a beta invite and try it out.
here's the one I put together this morning for fun: http://bit.ly/O5rlap