Amazon S3 for Offsite Backup

Sherry and I are enjoying our new Panasonic Lumix ZS3 digital camera with HD video capture; the only downside is that we're rapidly filling disk space with irreplacable image and video files. I've been researching options for using Amazon's S3 disk-space service as a repository for backups. I'm particularly interested in S3 because (1) it doesn't seem like anyone can beat the price and (2) I'm interested in getting my feet wet with S3. One possible Windows configuration:

• S3 WebDAV wrapper. This would expose the S3 storage via a WebDAV API. s3DAV is an open source example.
  
• WebDAV network drive wrapper. This layer introduces the ability to present a WebDAV source as a mapped drive. NetDrive is a freeware example.
  
• Backup software. Two good open source backup utilities are SyncBack and Cobian Backup.

A variation on the above would be using Gladinet Cloud Desktop instead of the WebDAV and network drive wrappers.