Today I traded in my Wii at Gamestation. Amusingly they couldn't take it off me fast enough as I traded it in for nearly 10 Xbox360 games. A year earlier that would have probably set me back about £400 (but now them being pre-owned it cost next to nothing). They say cars lose their value quickly! Obviously they don't know the games market.
Overall the Wii was a huge disappointment for me. I believe the reasons the SNES worked for Nintendowas because of 3rd party support, amazing first party titles and lack of competition. All these factors have slowly slipped away and now all that's left is a machine selling on the premesis of a gimmick.
I hope someone out there has more fun than I did with my Wii. As a gambling man however, I'm more likely inclined to bet that in a year or two everyone'll be rushing to do what I did before the consoles value plummets.