Me and the guys from Bureau BlauwGeel have been working together on their new website: http://www.bureaublauwgeel.nl
The CMS-based website uses video files to create a dynamic, living and breathing background.
Each menu item has a background image that slowly zooms in to keep that dynamic feel.
Although the background and interface always adjust to the size of the browser window, the content is allowed to run off screen. The flash scrollbar allows viewing all content.
By using a custom URL for every project and page in the flash site, the site becomes searchable for Google and allows direct linking to a specific project, for example: http://www.bureaublauwgeel.nl/#/werk/website-en-shop-dutchspirit
Tracking pageviews from flash allows the use of Google Analytics.