I have heard of someone once suggesting higher-tier forms of energy production. One of them, a much higher tier, was ''Zero-point energy''.
Due to the use of that term, it may have been intended to be the extraction of energy from matter until it reaches its ground-state (zero-point) energy level, where it still has some energy but can not lose any more by normal means.
But what if we could extract that lat bit of energy, pushing the matter below its ground-state? With the power of HAYO! technology, and even more high-tech stuffs/materials, we could make a ''one-way energy valve'' that allows the energy to be moved out of matter, but keeping energy from moving into it. This energy could be collected in a heat-sink material, ranging from water/steam (lowest heat capacity), beyond liquid metals, up to the highest-tier molten salts (highest heat capacity). This heat could then be used in a Heat Turbine (from this suggestion) to generate lots of EU (or just used in a higher-tier Heat-to-EU converter, but Heat Turbines could be good for a low-output beginner setup).
The Zero-Point Energy Extractor machine could possibly use any dust/material of any kind as fuel, and each possible input material has a different value of energy (in the form of heat) extracted between its zero-point energy and Absolute Nil. After all possible energy has been extracted, it becomes waste.
More specifically, ''Uniform-Indifferent-Entropic-Sludge-Waste''. It would a liquid-like material, but has unusual properties. First of all, it flows over a greater distance than water. It also makes entities caught in it move about as fast as in cobwebs. Entities that are drowning in it may not be able to get out of it at all. It can be picked up with a bucket, but can not have a block placed in its place like lava or water. It would be a much more effective pollution if liquids like in the Finite Water Mod is ever added as a mod/addon/part of IC2/part of Gregtech/part of Forge, as it would flow outwards and level off quickly, covering a large area. To get any of it in a bucket, the sludge would have to fill EXACTLY 1 block where it is picked up, but then it would level off again and another bucket of it would have to be added to the mass for it to be picked up in a bucket again. It would also be a reflective color, as it can not absorb any light, or any energy, as its physics have been broken.
Just thought that this may be a nice idea. If not, atleast it has been read, and thus will modify someone's ideas about what to add/suggest in the future. If it causes something to be added, that is cool/has an awesome purpose, then the purpose of this reply has been fulfilled.