VaultPress backs up WP.org install blogs to a remote cloud server. The VaultPress core engine will be able to update blogs with hot-fixes. VaultPress continuously monitors and stores updates to your blogs and sites.
More Info: http://vaultpress.com/
Plugin requires WordPress Version: 3.1 or higher Compatible up to: 3.1.1
Download and info: http://wordpress.org/extend/plugins/vaultpress-status/