So your fully stuffed with beer fridge thermostat broke and you have a nerdy look why not to fully computerize the process by your own. Arduino fits right well for this as you can easily control a compressor, log the temperature and even see what’s going on via web interface by using Arduino Ethernet Shield.
So why waste a spare Arduino with Ethernet only for fridge controller? So Author plans on putting a bunch of additional temperature sensors around the house and monitor them conveniently in web interface. Possibilities are almost endless and all started with a broken fridge. Thumbs up guys!