[scottfr]

I put together an implementation of their simple model at:

http://insightmaker.com/insight/2972

You can play with the different parameters and growth rates in this model to see the results. It wouldn't be much harder to add the features of their other models.

[rahulvohra]

Wow, this is cool :)

Mind if I add a link to it from the post?

[scottfr]

Sure, I also commented on your post with a link.