Hizook has been tracking VC investment in robotics firms for about two years, and has a list of the top companies for 2011, as determined by the scale of the capital infusions they've received. Topping the list, at $43 Million (US), is Restoration Robotics, which makes robots that automate the process of hair follicle harvesting for use in hair transplantation. (Currently implantation is still done manually.)