Amazon S3 gets versioning support

You can now enable versioning feature for a bucket. Each time you replace (or delete) a file, an old version is stored along a new one. When you retrieve a file, you get the newest version by default, but you can specifically request another one.

If you've ever used a version control system like CVS or Subversion, the concept will be familiar to you. If not, think of it as an undo operation for the filesystem - how easy it will be to recover from software or user error? Just remember to implement a scheme to prune old versions - normal S3 storage charges apply.

See this entry on Amazon Web Services Blog for details.