How about an iLife application that made building websites really really easy?
It would have the same kind of interface iDVD or Movie have.
You would be able to use prebuild themes or create your own.
Your iPhoto, iTunes libraries will be available allowing you to drag graphics and multimedia into your site.
You can preview the site in one click as it launched in Safari.
Easy drag and drop CSS/DHTML from a variety of prebuild or custom themes.
When you're happy with it, hit save and iWeb will build the whole site, even creating all subdirectories.
Then with one click the whole site can be published to .mac or your own server.