We do the same thing. Our CMS delivers views based on the type of agent and whether JS is enabled or not. It allows our users who aren't able to handle all the

We do the same thing. Our CMS delivers views based on the type of agent and whether JS is enabled or not. It allows our users who aren't able to handle all the fancy UI stuff (we have some blind users) to use the site without losing any functionality, much like Gmail static. With the proper design it's really simple to extend and add content this way.