The ioBridge dev team has been running websites and services in one form or another since 1996. Obviously nothing quite like this though. I understand your concern. As far as outages go, we do have a certain amount of redundancy built into our system. But that doesn't mean there aren't going to be times when the servers are down. We actually do need to pull them offline every once in a while to do upgrades (hence the "Beta"). We try to keep these service windows as short as we can.
As far as us going offline for good... we are going to do everything we can to stay in business. Just as you may drop a hundred dollars on our equipment, our team has a considerable amount on the line as well. If ioBridge goes under we'll be losing mortaged homes, retirement savings, college funds, etc.. so needless to say, we're a very motivated bunch.
If the worst does happen and we are forced to close up shop, then we'll release the server software so the modules can live on without us.