this like the stuff they fit to the expensave Merc's and BMW's ??
it uses electromagnets and metel particals in the oil
when you want it stiffer then you turn the magnets strength up and it uses the metal to thicken the oil to make the suspension stiffer
or thats how i understand it
but i do work for landrover and we use air suspension from the Ark still

it seems like a very expensave way of getting suspension to me , i fitted the Weitec coilovers to my golf and the difference is unbelieveable