SIP - Styrofoam Insulated Panel Homes
SIP's are a great way to build an Energy Efficient Home.
From an electrician's point of view, wiring a SIP-Home is a little more challenging, however once you understand what you have to work with the wiring goes just fine.
The Key is timing and the other contractors understanding that everyone must be willing to have what I call "Occupational Courtesy", that is being considerate of what components need to be installed before the next phase begins.
If you don't have this, something will be left out or worse something will not have a vital connection. I really believe that SIP homes will out perform standard stick-frame homes when it comes to energy savings.