As lead backend developer of this single page application (SPA) hybrid website, I architected the CMS (Umbraco) to support advanced features, including:

All content is editable and can be organized in any order. Maximum reusability and customization is possible.
Page sections have their own URL's, which are updated with the HTML5 history API as the user scrolls (i.e., no page refresh is required). Users can then share these URL's so others can be linked to the same section.
Even the most sophisticated features can be reorganized in the CMS, simply by creating them and sorting them with the intuitive Archetype interface.
All forms are submitted with AJAX and can have custom workflows attached to them using the Contour workflow editor.