Oooohhh - hadn't heard of this before, but wondering if this would be good to spray down a pack with. Could be a lot of uses, and if it's breathable, you could take a 2oz windshirt and make it a rain shirt. Site says it can be used on fabrics. Of course there's some marketing spin to it, but hard not to be hopeful.
Interesting quote from the site regarding durability:
"Ross Nanotechnology, LLC provides a solution to these problems with NeverWet™ superhydrophobic coatings. NeverWet™ coatings have remained under seawater for over a year and reemerged completely dry. When dirt and dust sit on one of our treated surfaces, water quickly flushes it away. The water is repelled by our coating, and the dirt is attracted to the water. Even under extreme conditions like high pressure spray, they maintain their superhydrophobic characteristics."