Here is a full list of Wii Opera browser commands that you can do with the Wii Remote controller to more easily navigate with the browser:
Secret Commands:
B + Directional pad up: Refresh current page
B + Directional pad down: Favorites/Bookmarks
B + Directional pad left: Search current page
B + Directional pad right: Enter new URL (similar to address bar in your common browser)
B + (-) key : Go Back a page (similar to back button on your browser)
B + (+) Key: Go forward one page (similar to Forward button on your browser)
Regular Commands:
A: Select/Click
Hold B: Free Scroll (much like pressing middle mouse click and moving the cursor in the way you want to scroll)
2 Button: Switch between Automatic or Manual zoom
(+) Key: Zoom in (if in manual zoom mode)
(-) Key: Zoom out (if in manual zoom mode)
Directional pad up: Scroll page up
Directional pad down: Scroll page down
Directional pad left: Scroll page left
Directional pad right: Scroll page right
Thanks to Shogun for making the list.