LOL! good one falko!
I've got asterisk servers setup in several places including my office. If you checkout asterisk@home located at asteriskathome.sourceforge.net you'll find you can have a full blown asterisk server up and running in less than 30 mins.
Basically just download the ISO burn to a CD, drop it in a machine and bootup and let it install.
Don't be fooled by the "@home" part of the name. That is a big debate right now (name change). Asterisk@home provides you with a complete web based control panel with incredible flexibility and power.