Imagine you have some temperature sensors lying about. And you're a geek. And you're a home brewer. Nuff said?
(via Slashdot TV)
Build a beer tree from a server rack to house your hot liquor tank, your mash tun, the boil kettle.
Use those excess temperature sensors to control the boil and later the fermentation.
Add a software layer of Bash scripts to automate everything everywhere, and, voila, you've got a