Opera Playground

http://japan.cnet.com/news/tech/story/0,2000056025,20381351-17,00.htm

This is a photo report by CNet Japan. You can see last 4 photos which show DSi Browser.
Descriptions say (when you :hover your mouse on the image, popups says "Click on the image, you can see next image.");

• photo 17: You can download softwares at DSi shop, one of them is DSi Browser. You can connect to the Internet via wireless LAN. The lower image shows "Please wait…"
  
• photo 18: View of CNet Japan site with DSi Browser.
  
• photo 19: You can select 3 ways to view web sites, direct input of URL, using search and bookmarks.
  
• photo 20: You can select between Google and Yahoo!Japan for search engine, and set image load/unload. The lower image shows you can set automatic text-wrap ON/OFF.
  

http://www.nintendo.co.jp/wii/index.html
It's 25,000 JPY (including Tax)

Add; Iwata-san's presentation movie, in which you can see Opera's working at 24 to 26 min.