To insulate with straw is one of sustainable solutions, because it functions well, it grows every year, it is a bi-product of growing a wheat, it is (or can be) local and does not produce waste. Prefabrication of straw walls is one of the ways how to fast and comfortably use straw in mainstream building industry.
There are several straw panel producers and they have been on the market for more than decade. Here is course for building with panels EcoCocon.