I think an online service which catered to businesses only and provided a customer service rep that was extremely knowledgeable on these matters who would be assigned to your company and provide support would flourish. He or she would ensure that your setup was correct and that your data could be retrieved quickly either via the net or via courier service. The files would be encrypted, but your concierge employee would still monitor for things like skipped days, etc.
I thought the same thing. I developed a backup service just for Amazing Charts users. Except I took it a step further. I offer cloud access until your local server gets fixed. Once he or she gets the server fixed/replaced we can mail the data back or upload it back. (I prefer the former, good for people with slow connections.) It's a differential service too backing up both II and the database daily. So it works with people who have slow DSL or mobile connections. Can have minimal downtime (hybrid cloud) at a cheap price ($65/month).