This is a good point. Beyond the privacy concerns, there's the problem of not having any control over when the software disappears. One of the better general pu

This is a good point. Beyond the privacy concerns, there's the problem of not having any control over when the software disappears. One of the better general purpose web-based productivity apps was DabbleDB. I got a friend hooked on it and he invested a bunch of time basing many of his companies internal processes on it. They were subsequently acquired by Twitter and shut down the service.