Interesting; however in my opinion I'd redesign that page. Having a lot of the information behind the interactive scrolling will cause it to be lost. Personally, and I know a lot of others, just scroll the page and look for the relevant information in paragraph form. Much easier to digest. This implementation forces me to stay on the page and is a bit frustrating.
I just posted the exact opposite of what you said :) Usually these "scroll hacks" are annoying. In this particular case the "flow" of calls is captured really well this way, IMHO.
