I think Cloud computer is the answer to many common data management problems. I have often had to try to retrieve lost information after computers have crashed. I encourage teachers and students to make back ups (not just save) when ever they have more data entered than what they want to reenter. In other words, stuff happens. Online back ups answers the broken, lost or stolen hardware problem.
I teach my student about googledocs. It works great for assignments that they want to work on both at home and school. So many times I have compatibility problems when the student bring in work from their home computer software.
I do have reservations about Web OS, space can be limited and what if the server decides to charge after all of your documents are online. I hate to sound paranoid but all of my family pictures could be held hostage:)
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