Good for them!
The REI I went to recently sold mostly ENO stuff and no polyester webbing. The only webbing they had was nylon (a few different types), even when the guy checked the computer. He even went so far as to tell me that "Nylon is the industry standard, and it may be hard to find polyester webbing..."
I guess nylon works (even if a little stretchy)... but instead I ordered my webbing from one of our cottage dealers here. Readily available and really good stuff!
If anyone is interested, they can check out Arrowhead-equipment, dutchware, whoopieslings, and many many more that have some great supplies to get started down the addictive path of hammock "pimping."