Security of web-based data storage

A while back, I said I looked for but didn't find any best practice standards for web-based data storage. Today, I found something. Whether it's any good or not, I don't know yet, but there is the Cloud Security Alliance.

"The Cloud Security Alliance is a non-profit organization formed to promote the use of best practices for providing security assurance within Cloud Computing ... "

Regardless how effective this organization - and technical failsafes - may be, the one constant is that all systems will fail at one time or another. Anything that involves "unstable" variables, such as human beings, will have intrinsic flaws. 

One takes the prudent measures one can and strives to fail smartly.