Mycelium packing materials

My wife came up to me the other day and said that she hear on the radio earlier something that was "right up my alley:"  packing materials made out of mushroom roots.  Get something in the mail then throw the packing material on the lawn or in the garden, definitely better than peanuts!

I looked around today and found these:  http://gadgets.boingboing.net/2009/05/14/insulation-and-packi.html
http://inventorspot.com/articles/insulation_and_packaging_products_made_mushrooms_roots_ecovative_26586

I'm pretty sure we had talked about this use somewhere before, but a quick search here didn't come up with anything...so here it is (maybe again)!  Worth mentioning again anyway, I'd love to have this as the packing material I got...

That is definitely an 11 on the cool-o-meter.

I can't see if they use this stuff as a construction material, or just as a filler.

Imagine building a house, filling the walls with growth medium (straw? agar?) setting some spores free and turning up the humidity. Plus, I am sure there are applications for mycellial chiton in making armor, structures, etc. but that may take genetic alteration of the mushroom species so that they produce mycellium with the correct characteristics. Oh and I totally brought this thread back from the dead.