Flat-Free Foam tires for bicycles - free sample piece

Spotted this on a Freebie stuff deal forum. Not much of a deal, it is just a
piece of a tire, but it might be interesting to examine. An older
discussion, http://tinyurl.com/46x8v , has some favorable comments.

http://tinyurl.com/7ydvs
http://www.amerityre.com/index2.cfm?...catego ryid=4

Sample piece he
http://tinyurl.com/3t6qh
http://www.amerityre.com/index2.cfm?...on=samplepiece of tire

"Amerityre manufactures Flat-Free Closed-Cell Polyurethane Foam tires for
bicycles and scooters, golf carts, lawn & garden products, wheelbarrows &
handtrucks and other specialty products. "

is this the sixth or seventh time this has come around?
I think I've lost count...