WinS3fs is a filesystem for Windows allowing access to Amazon S3 Storage. It implements a local virtual SMB server \\s3 to allow access to Amazon S3 buckets
simple and straight forward to use
It somewhat works under Windows Server 2003. I can read the buckets, but not write to them. I can't get it to run at all under Windows 7. It is a great idea, and I hope that it is updated soon.