I tried talking about this before and I kind of failed. I made a video here if you like to watch of the dream mod / feature.
http://www.youtube.com/watch?v=X_b9xhU-uFM
Pretty much Industrialcraft is a wonderful wicked mod for PVP. Smaller Maps like 2000 x 2000 maybe bigger maybe smaller depending on the players. Pretty much the game is true survival. You must advance to a certain age of technology before life gets any nicer to you. What you need to do is get good enough big enough etc to end up creating a Forcefield / Shield / Defence Grid or whatever name you like. Once you get this baby online she will suck and suck and oh WoW does she ever suck EU's. The point of this is it's 100% unbreakable under anything. Nukes, TnT, Players, Drills, Mobs NOTHING!
WHY NOTHING?? DERP EASY MODE? No not really I mean you would have a config file maybe EU costs and some math but also max size of this generator etc. But really the point of the game is to reach a tech where you can be safe in your own home... I mean hell this not going to do much for you outside your home.. The point is to survive and save enough resources to actually sustain the generator and keep going. From there you still want to expand but also conquer and etc.
This puppy take so much energy it can't even be mobile and if it was it would last tops 1-2 minutes on a 1mil eu crystal expanding maybe 5 blocks out tops...
Anyways I think this would bring an amazing challenge to IC for people who might be more into PVP. I think this be a wonderful SMP feature to add overtime into IC and also wonderful opportunityto create a mod/addon to IC with this.
Anyways I hope you like it and let me know what you think!