The point here is not about picking winners between S3 and you/me; Probably that's a no-brainer at this point.The thing to worry about is whether S3 is reliable

The point here is not about picking winners between S3 and you/me; Probably that's a no-brainer at this point.The thing to worry about is whether S3 is reliable enough that you can trust your user's data with S3 alone. While S3 might be doing this for a living, Amazon doesn't. AFAIK,revenues from cloud services are not at all significant given Amazon's scale. What does S3 license say? Is Amazon liable if it loses data stored in S3?