This is my prediction:
Around the time Nintendo releases the Wii firmware update which officially activates the two USB 2.0 ports on the back of the Wii, a press release will come out regarding the partnering of Nintendo and Apple to bring iTunes and iPod support to the Wii.
The circumstantial evidence:
1. All new iPods utilize USB 2.0. Iwata was once quoted as stating that most USB storage devices would indeed work with the Wii. Logically speaking, the ability to use iPods as storage devices for Wiis would work extremely well.
2. Nintendo has been flattering Apple recently, not only with the designs of their products but also with Reggie's comments about the iPod, Apple's ingenuity and how Nintendo hopes to accomplish the same feat with the Wii.
3. The Wii supports Quick Time media formats, something which requires the
licensing of Apple's proprietary codecs to do. By contrast, neither the 360 or PS3 support Quick Time movies. This means that Nintendo and Apple have already sat down at the bargaining table at least once. Is there a second shoe waiting to drop?
4. Both the Virtual Console and the iTunes Music Store use the
Akamai file distribution software to download media. This means that the infrastructure necessary to download iTunes media is already present on the Wii with BOTH Akamai support AND QT media formats for mp3s and movies.
5. It's a win-win, especially with MS and Sony each trying to push their mp3 players and services on their respective consoles. This way, Apple gains a spot at the console table and isn't left out of that market and Nintendo offers the largest mp3/movie download network on their console so they don't miss out on a selling feature their competitors offer.
I think it'll happen simply because it makes more sense to have it happen than not: Apple sells more movies/music and Nintendo gains even more non-gamer appeal and will no doubt receive money for music/movie sales as well.
Now we just need to wait a few months to see what happens...