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.