Klaas and Frank tricked me into getting side-tracked from my hack week project and writing a command line tool for installing ownCloud. After a little bit of hacking I have a tool, which is able to install ownCloud to a local machine or to a remote server via FTP. There are a couple of issues with setting up ownCloud, when you only have FTP access to the server, but Frank is looking into a solution to that.
The code is at github.com/openSUSE/owncloud-admin. Next steps will be adding support for other installation methods and targets, e.g. via ssh or to specific systems like some of the popular NAS systems you might have running in your basement already.