ALGORITHMIC MODELING IN REVIT???

I was on the Design Reform website a few days ago and noticed a cool mass created in Revit, it made mention to algorithmic modeling in revit. I vaguely understand the process of creating a generic mass and setting parameters for the geometry. If there is anyone out there that could enlighten me on the subject, maybe with a tutorial it would be greatly appreciated.

Check out the pdf file.

Thanks I will have fun tonight awesome.

Phil Read isprobaly the best one to talk to about this. He's shown something similar at several AU's and has posted the same here as well. He might chime in to this dicussion or you can do a search.