What do you do with the data that people upload? Without some strong guarantees (in the form of a business model that somehow depended on it) I would not upload anything that wasn't already public to a service like this. (I wouldn't anyway, but I would discourage others)
With ScanSearch, documents and the information on them flow effortlessly into the hands of the people that need it most without the traditional upfront manual effort of indexing every document with searchable keywords.