digg this 

 With the new Wii 3.1 system update and the updated Internet Channel from Opera, usb keyboard support has been added. Naturally, the first thing I wanted to do was to be able to surf the web using my wireless keyboard (Logitech Cordless Desktop S510), and minimizing the use of the Wii controller. That means keyboard shortcuts. However, searching Google didn't turn up anything (nor did any documentation from Nintendo or Opera). Thus, here's what I've found so far via trial-and-error:

alt enter: select "OK" in the Wii virtual keyboard screen (very handy when filling in text boxes)
alt backspace: select "Quit" in the Wii virtual keyboard screen
up arrow: scroll page up
down arrow: scroll page down
left arrow: scroll page left
right arrow: scroll page right
+ sign: zoom in (also num pad)
- sign: zoom out (also num pad
backspace: previous page
ctrl left arrow: previous page
ctrl right arrow: next page