A few weeks ago I received an interesting presentation from a young man in California who is, among many other things, interested in presenting information and telling stories with the aid of dots. His name is Jeffrey Monday and his blog is called Monday Dots. Below is an example of his work. He made this using Keynote (using the Magic Move effect) and did the voiceover using iMovie. It's not perfect (e.g., color issues) but I think this will give you some ideas.
"The Gamble" model
Take a look at this example below. Do the dots help his explanation?
In this video below Jeffrey explains why he uses dots in his presentation visuals.
How to make the presentation above in Keynote + iMovie
Below Jeffrey explains how he made the visuals.