The author is completely dismissive of security concerns, but is incorrect in this attitude. These problems are not primarily technological (we know how to keep

The author is completely dismissive of security concerns, but is incorrect in this attitude. These problems are not primarily technological (we know how to keep secrets, if only we could get users to follow the rules), so the barriers can't just be broken down by smart people. The problem is regulatory. HIPAA and Sarbanes-Oxley make online documents a non-starter for significant sectors of the economy. As long as business can be penalized to a degree that far outweighs any benefits for such decisions, these shared online systems will not chase away the traditional "I run my software and control my own data" model.