At this point, no photo storing company is reliable. It might actually be a competitive advantage to form some sort of photo sharing company that has legally committed to not letting a big guy buy them and shut down their service like this. Of course, then you have the other side where they often die due to lack of hosting funds. So you'd have to charge a lot and legally require it be put into a fund that only pays for hosting or something. Tough business problem, but wanting hosting is common and not wanting Google to come blow the service away is becoming common too...