Here is the link to a company in Ft Lauderdale that makes them.
Photosails

I'm thinking of promoting my sons company (Ian's Wicked Good Donuts) this way and deducting the cost of the sail and charging some yearly advertising.
Kind of expensive at $ 32 per square foot so I am just considering the jib at this time. Looks pretty cool though!
Thanks
Greg

The nice part about being a pessimist is that you are constantly being either proven right or pleasantly surprised. - George Will
"It's not that liberals aren't smart, it's just that so much of what they know isn't so" -Ronald Reagan