You're welcome. If you want to deploy and maintain many machines, then maybe FAI[1] might be worth a look. It allows you to maintain a consistent state over an arbitrary number of machines running a Debian-based distribution, with _and without_ virtualization. We used it to run about 40 user-facing desktop machines and about the same number of cluster nodes. You basically have a central server that contains configuration, configuration-modifying scripts and package configurations. It is possible to define classes of machines, and one machine can belong to multiple classes, so you can have a part of the configuration identical on all machines and then other parts only on some of them.

[1] http://fai-project.org