I signed up for a news letter form the company that makes this product. I thought it looked interesting, particularly for Tiny Home construction.
It's like SIPs with a lattice/honeycomb of material inside. There are a number of charity organizations that build small shelters for homeless people, and I think this would be a good choice for flooring on such an application. I need to look at the price per panel to see if it'd really be good for Tiny Home construction.
In the U.S., it looks like it's available through Lowe's.
http://singcore.com