With a new way to share iWork documents between your devices using iCloud, the iWork.com public beta service will no longer be available. As of July 31, 2012, you will no longer be able to access your documents on the iWork.com site or view them on the web.
We recommend that you sign in to iWork.com before July 31, 2012, and download all your documents to your computer. For detailed instructions on how to save a copy of your documents on your computer, read this support article at Apple.com.
Apple recently shut down its MobileMe service as well.