Our company wants to sell cloud storage so we would like a software for windows machine(at first) that synchronizes the files of a folder of our customer's desktop with the user account in our web site. In other words, it is a service similar to dropbox, [url removed, login to view], copy, ... the difference is that this project is only for windows machines. All the files will be storaged in our Amazon S3 account. Basically what you will have to do is to use rsync with a little coding and web development. Please let me know any questions you may have. Thanks.