Not sure if this is old. But the Steam Link and Steam Controller is available for pre-order on Amazon. For anyone who doesn't wanted to order from Steam Directly or gamestop.
http://www.amazon.com/gp/product/B016XBGWAQ?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00
http://www.amazon.com/gp/product/B016XBGWAQ?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00