Minecraft wiki entry for Nether_portal, associated text: A LEGO Minecraft nether portal was included in the LEGO Minecraft Set: "The Nether".
On 29 October 2010 PC Gamer released this video, showing a portal being constructed and used.
On 1 April 2011, Think Geek released this video to advertise one of their annual fake April Fools products: the Minecraft USB Desktop Nether Portal.