... I want this!
The stuff it's submerged in goes for around $250 a gallon and is called Novec 7000. It boils around 35c, so it's perfect for cooling minus heat sinks. The processor they have under full load is a first gen i3, it maxes out at 50c with one exhaust fan! Extremely impressive with no heat sink, and I'm sure if they even had a stock cooler on it, the temperatures would be incredible.
Also it apparently isn't the absolute mess that mineral oil is, and dries relatively fast with no gunkyness afterwards.