i just read a letter in a magazine about media streaming to a wii, so i gave it a try. 5 mins is all it took before i was viewing files from my laptop using my Wii. video quality is awful compared to direct streaming via my ps3 but for photos and music its bearable, and useful too if all you have is a wii.
just download orb at http://www.orbnetworks.com
and you too can view media using your wii.
Its free if you already have the opera browser installed.