Thanks for the ideas, guys.
WTFFFS - Early on you run 4-8 geothermals? How do you supply them with lava? Enderchest and pump the nether? In my current setup, I have 2 hobbyist steam engines that I manually throw charcoal into running into a magma crucible that melts netherrack that I also got by a quick trip to the nether. But even filling that one geothermal, it took about 2 hours of having the crucible constantly running. The geothermal then goes into a batbox which feeds another batbox so I have a buffer. That 2nd batbox powers an Extractor, Compressor, Electric Furnace, and Macerator. If I don't use any overclockers, they seem to work okay, but if I throw any in, it slows down. I guess the batbox because it can only put out 32EU/t is the bottleneck?
Oh, I also have a coke oven and IC tank? (the red/clear one) about 4 high with creosote oil in it. Not sure how many buckets that is. I've blown through a lot of coal that route, though and I stopped using it because I'd rather save the coal for diamonds.
So yeah, the point is that the system I'm running now isn't really sustainable and requires some manual intervention. Feeding the two HSE isn't that big of a deal and neither is going to the nether to pick up a few stacks of 'rack, but I want to automate things. The biofuel idea is because I love watching the Mindcrack guys and I was impressed by the setup they have on their server. Plus I keep hearing how biofuel is a pretty efficient fuel if you don't have an oil well nearby.