Dropbox is one of many "applications built on top of S3/EC2". That's not an analogy, because you really don't need one. S3 is for developers, not users. Users d

Dropbox is one of many "applications built on top of S3/EC2". That's not an analogy, because you really don't need one. S3 is for developers, not users. Users don't care where Dropbox stores its files.