The Ground Surf from 1135 Garnet looks like it might be a design concept and not an actual product as of yet. There are next to zero details on the site. Sensors supposedly adjust speed by weight placement, which seems like it might be hard to control. Good news though, if you fall off those sensors will apply the brakes. Nice neo-art deco design. If Deckard rode an electric skateboard, this is what it would look like.
[Source: The Khooll] - Thanks to Kathleen for the tip.