I've also been adding photos of the pages to my flickr stream, since the actual book won't last more than a few years before needing to be replaced. At least then I'll have a picture for documentation. Since I use mine as a tool to carry to the fabric store, and not really an archive of my fabrics, I'm not counting on it surviving forever. Someday I'll have to decide on a method for preserving the swatches long-term.
If you are taking pictures of your pages, feel free to add them to the flickr group. People enjoy looking at them and it is nice to have the photo for your own online reference.
Here are links to more info about the Swatch Book Cover: