In keeping with the "Drunken" part of our name, we're making the Lagermeister, a temperature controller for fermenting beer (primarily lagers, as ales can do fine at around room temperature).  The construction is done, but not the write-up.  In the meantime, the arduino code can be found at https://github.com/stevenorum/JBC-Arduino-Gadgets/blob/master/jbc_lagermeister (although without the wiring diagram, which is also in progress, it won't mean much).