Okay being male, my first reaction was way cool (to the water repelling, self cleaning stuff).
But to Greg's point, what activites/projects/examples would be more motivating to girls/women?
One thing we are looking to add to Etoys (through a hopefully funded GSoC project) is lilypad. So you can create "computational textiles". Besides being of more interest to girls, I think it will add a cool fashion factor, which may make programming and technology more culturally acceptable to female students.
Nice article here on lilypad
Here is a youtube example