joetan

This WordPress plugin allows you to use Amazon’s Simple Storage Service to host your media for your WordPress powered blog.
Amazon S3 is a cheap and cost effective way to scale your site to easily handle large spikes in traffic (such as from Digg) without having to go through the expense of setting up the infrastructure for a content delivery network.
Once setup, this plugin transparently integrates with your WordPress blog. File uploads are automatically saved into your Amazon S3 bucket without any extra steps. Once saved, these files will be delivered by Amazon S3, instead of your web host. Any image thumbnails that get created are saved to Amazon S3 too. You’ll also find an “Amazon S3” tab next to your regular “Upload” tab, which allows you to easily browse and manage files that were not upload via WordPress.
<h3>Documentation</h3>
If you need more help installing and configuring the plugin, <a href="http://code.google.com/p/wordpress-s3/wiki/Documentation" rel="nofollow ugc">see here for more information</a>.

Amazon S3 for WordPress

Allows you to mirror your WordPress media uploads over to Amazon S3 for storage and delivery.

dreamsofmatter

This WordPress plugin makes it possible to show content from one page on another – it mirrors content. It’s a very easy to use, but yet a powerful plugin.
It takes content from pages, posts and custom post types and shows it on other pages, posts or custom post types. It also works between sites in a Multi-site configuration. For instance, if you have a web site with one site for each language, you only reuse the same information on all sites.

Content Mirror

You can display content from one page or post on another by mirror content. This also works between sites in a multisite configuration.

Amazon S3 for WordPress vs Content Mirror