Now this is candy. Heroku went for an extreme eye candy, powered by HTML5 on their how it works page. It makes just perfect sense to explain their quite complex technology very visually and interactively.
The first page doesn’t look very impressive, and it could as well have been an image, but when you start hovering the different areas and decide to click one of them, a quick explanation comes up right next to it.
The brief information is linked to some more in depth articles on the topics. Even though heroku is aimed at developers who know their ways around terminals and probably need highly scalable environments, it’s still great to open up around this and not put it on a plain text page with no stylesheet.