Our core focus will be businesses that want to control their own storage.

Is entering your S3 secret ID and key too cumbersome for most customers?

Yeah, I think it is too. As technical people its not a big deal for us, but you should make it as easy as possible for people otherwise you'll lose the business to a potentially inferior competitor who makes it nice and easy

Since one of the target market is businesses, I would assume they have at least 1 guy to do that for them (enter S3 key and ID). They aren't going to be part of your market if they don't.