Plugin for running your WordPress site without Write Access to the web directory. Amazon S3 is used for uploads/binary storage.
This plugin was made with cluster/load balancing server setups in mind - where you do not want your WordPress to write anything to the local web directory.
WPRO will put your media uploads on Amazon S3. Unlike other S3 plugins, this plugin does not require your uploads to first be stored in your server's upload directory, so this plugin will work fine on WordPress sites where the web server have read-only access to the web directory.
This plugin was made for WordPress sites deployed in a (load balancing) cluster across multiple webservers, where you do not want your WordPress to write anything to the local web directory.
Note: You still need write access to the system /tmp directory for this plugin to work. It will use the system /tmp directory for temporary storage during uploads, image editing/scaling, etc.
We did not test this plugin in a WordPress MU environment. It will probably not work out-of-the-box for WordPress MU.