I have a working jello simluation! I implemented Euler and Midpoint integration schemes, but RK4 is the most stable and the most pretty, so as soon as possible I'm going to import it into Maya and make an interesting scene to demonstrate with.
Things I still want to implement: Friction, inclined plane intersection, importing into Maya
Fun ideas for the future: Non-cube meshes (My dream is a Pusheen jello), jello on jello interactions