The Wii (well, the Funtendo Zii) was on The Simpsons!

[Kenny]

http://www.1up.com/do/blogEntry?bId=9018400

After the appearance of the XBox 360 and Halo 3 on The Simpsons, comes an appearance of the Wii on The Simpsons.  Interestingly, the "Zii" uses some of the actual sounds from the Wii, and unlike the 360's appearance, can be very clearly identified as a Wii in every way but the name.