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.