drpkg is a package manager for drupal. It is inspired by the Debian's dpkg, hence the name, and apt.
Long term you should be able to update, install, upgrade and clone a drupal setup using the package manager. Maybe more.
At the moment the code is in an early phase. Pre-alpha.
To get a working copy do svn checkout svn://mec0026.engi.cf.ac.uk/drpkg
You can browse the repository using your favourite web browser.