Apple first introduced iWork.com as part of an iWork software refresh in January of 2009. The goal was to allow iWork users to share their documents online for collaboration with others—sort of like a Google Docs, but by Apple. Since then, however, Apple launched iCloud—among other things, the service allows apps like iWork on the iPad to sync documents to other devices, and the launch of Mountain Lion for the Mac will bring that same functionality to the desktop.
via Apple: iWork.com to get the axe on July 31 so back up your documents.