The ancient tradition of brewing beer doesn't need to be complex, but that doesn't mean we can't make it complex.
Halfluck automated brewing system
This system also seeks to automate the brewing process. The Halfluck was the creator's very first attempt at a microcontroller-based project, and he managed to pull it off pretty well.
The Arduino Forum post doesn't offer much information on it, but for some reason, I love seeing these twin pumps in action. For a bit of perspective, those pumps are doing a job that's normally done in a couple of minutes by siphoning with a simple piece of hose. This is incredible overkill -- and I like it.