We worked out our backup strategy for our time tracking system (http://letsfreckle.com/) while in beta. While we're still small, we do full db dumps to off-site, once an hour.

This does not require a lot of sophistication. And yes, we might have some downtime while we restore in the event of a catastrophe, but we do have the data.

I can't even imagine the nerve of shipping a product to the public that doesn't have even something this rudimentary in place.