Most Salomon skis, especially the park ones like the Thruster and Spk are very light, and Head JO pro are a very light and sick ski. ^Public Enemies^ are pretty heavy, at least the ones I have. I here Moment skis are also ridiculously light and a very core company, so they are definitely worth checking out.
Lizzies are sick....but they are real wide for park, even if thats what pollard uses them for. They would be hard to spin onto rails, but would have way more stability. Plus he's looking for something really light, he said and i can't picture a ski designed for park abuse with ath much underfoot being as light as Pipe Cleaners, Thrusters or Jon Olssons.