The Betty Foy bike frame, Rivendell Bicycle Works. It's not a Pilen, but I suppose its ok.
X-9 Nighthawk - experimental bicycle frame made from super light carbon fiber on top of sandwiched panels of water-jet cut aramid honeycomb. It features an infiniti3D security system courtesy of Atomic 22. The X-9 Nighthawk has received a lot of attention lately, and a production plan is in the works.