Based on my experience with ultimate 1.1.2, I'm likely going to use thaumcraft golems and ender chests in conjunction with Forestry and IC2 for relatively low-output high-volume EU generation and high output high-volume MJ generation in my next world. I spent far too much effort in my current world early on working toward renewable energy (using windmills and a thorium reactor), may as well go straight for something that is effectively renewable.
More or less, it's as simple as using forestry multifarms to produce wood and saplings which will be put into ender chests conveniently placed near processing stations. Golems will feed saplings (and mulch if I can be bothered to figure out the proper input side) into fermenters. Elsewhere, golems will take wood from the same colored enderchest to an electric furnace (or induction furnace if power generation gets high enough for me to be comfortable with it), where other golems will take the charcoal to plain old generators. I experimented with coke ovens and golems, but I found that in order to keep up with the logging I'd need far more ovens than I'm willing to make.
In my current setup, my only multifarm set to have any sides configured for tree harvesting has only two slots set for wood. I'm using balsa, which at the moment has the highest sapling drop rate (although in the future things are changed in forestry so that different saplings produce different amounts of biomass). Even just using water, this is sufficient for at least 8 biogas engines. In addition, although balsa doesn't produce as much wood as larger trees, and default generators are stupid, I've had little trouble keeping up with power generation, although my current setup only has three generators powering a batbox (meaning the batbox will output 32 eu/t and the generators will input 30 eu/t. The minimum efficient array size would probably be five batboxes being powered by 16 generators giving off 160 eu/t). The rest of my power is provided by solar (about 12 advanced and 30-40 regular), 10 windmills, methane, and BC fuel. Sufficient to run two gregtech machines requiring 128 eu/p simultaneously.
aaaand long post is long