Once you have built a Flash animation, why not add content management to it?
www.wildeandwoollard.com is a great example of a website that is Flash enabled and is 100% content managed. Every section in the website was created and populated by the client, in this case, a non-technical marketing manager. We are proud to say our content management system was so easy to use that we didn't recieve a single call about how to use the system since training the client.
www.envi.com.au home page show a series of rotating images that are entirely content managed by the client. No matter how many images they add, the CMS ensures they slot into place.
www.zuccalahomes.com.au see the revolving image of the house on the home page? It's a flash movie that the automatically loads a selected house from the content management system.
www.greenpower.com.au displays a content managed events calendar for everyone who has registered on the website and had their event approved.