A mechanism needs to be developed that provides for updates to our production (and other) server. It needs to be simple to use, easy to extend, and scripted so that we can push out enhancements to the web interface, new module functionality, and other modifications as needed.
James is currently looking into Capistrano http://www.capify.org/index.php/Capistrano and Webistrano http://labs.peritor.com/webistrano , two open-source deployment packages that might serve our needs.
We've decided Capistrano isn't the way we want this project to move; we currently have an upgrading mechanism that allows for what are now called 'migrations', built in PHP as an addition to the installer. I won't close the ticket until we are sure this is as far as we want the upgrader to go; it doesn't download new files from an external source, nor can it 'distribute' or push out new changes.