The Hobbyduino Mini allows for shields (or plugs as I call them) to be attached in somewhat the same way as the Arduino.  As such, I would like to present one of the first shields developed for the Hobbyduino Mini called the Hobbyduino Mini boot-loader ISP Plug.  This plug (or shield if you like) can be used to burn the Arduino boot-loader onto blank ATMega328 or ATMega168 chips.  In essence, this plug is a minimalist AVR ISP programmer.  Go here for the project.