PC completely submerged in mineral oil, which is not conductive so the computer actually works. It has fancy features like a RGB LED strip, bubbling treasure chest, oil pumped to two radiators for cooling.
With regards to the competition. I don't even know if I qualify, and I don't really care, I just want to show off and get feedback.
youtube video (includes oil pour)
full blog post with engineering thoughts, details on components, and temperature readings