This is a new service by Microsoft recently released yesterday, December 12th. Sign up is free and a Microsoft-type login, Windows Live ID, or Microsoft PassPort account is required. It is an interesting service because it allows for 1000+ documents to be saved online. They can be accessed from anywhere by using a web browser and work can be shared with others hassle-free. Files can also be opened and saved directly from Word, Excel, and PowerPoint. Try it out!