I received a newsletter from amazon some hours ago with some news about S3:

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We are pleased to announce beta support for Amazon S3 bucket policies, which gives customers the ability to create conditional rules for managing access to their buckets and objects. Amazon S3 customers now have the following options for restricting access to their resources:

• Authenticated requests: Allow or deny access based on AWS account
• Query string authentication with expiring URLs: Allow temporary access to resources
• Request-based restrictions: Allow or deny access based on request attributes, such as HTTP referrer and IP address

With bucket policies, customers can also now define security rules that apply to more than one object, including all objects or a subset of objects within a bucket. This makes updating and managing permissions easier.
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This makes S3 much more fun! You can create temporary access to resources based on a query string like session id’s.

You can restrict content to be used only within your website without external linking (HTTP referrer).

And simple group editing using security rules, just change the rules for a folder with one command instead of executing it for every file!

I like that!

More control over your own data and easier editing!