The update previously only released in Japan has finally hit stateside. In the update, you can expect a couple of new things:

1. New High Quality vids and an option to switch between them.
2. Add games
to a favorites list, perfect if you're buying a bunch
3. Video
recommendations
4. Easy access to gameplay records & other records
5. Easier access to DS Demos & DLC
6. You can now Recommend DS
titles (I assume you can also reccomend DSiWare) by connecting your DS
And
More that I have yet tocome across in 2 minutes of use.

Source: My Wii