I came across the Vegas Background jQuery plugin while looking for a way to add scalable, full page backgrounds, possibly with a slideshow mode.
It was everything I wanted, but then I had to figure out how to implement it on WordPress in a way that would be easy for other users to have control over the images and settings.
That's when I found this WordPress plugin. I really love it and the developer has put great effort into improving it and adding new features.
It works great and it's surely the easiest way to add Vegas Backgrounds in WordPress.