Saw a French fellow I've done some work for installing teak decks on his boat, only to find out that it isn't teak...

It's called "Marine Deck 2000", and the best way I can describe it is to say it looks like rubberized cork.

It comes in 'planks' of about 5/16" thickness, and when you order it, the company makes it custom using CAD to the deck layout of your boat (you send 'em a diagram/drawing, I think). The stuff is surprisingly tough; the piece I got from the fellow here didn't break until I had folded it double, *and* squeezed hard at the fold.

It is nice looking, has insulative (is that a word?) properties, is owner-installable, and is supposed to last for 30 years. If it gets excessively soiled, you can sand off down to new looking material again, and it is also replaceable.

More info at the site:

http://www.stazo.nl/html/exterior.html

The fellow here has a 50'ish modern-design boat (read: beamy), and he told me his installation cost was right at $10K (that included the decking materials, and all adhesives etc needed for install). The American importer/distributor is up in Maine, if I understood correctly.

Here's a pic from the manufacturer. Lot and lots of info at the site.