Browsing the web on a console is kind of a stupid idea. That's what we have PCs for. But if you must, here's our take on the Opera/Wii browser versus the PS3's browser.
Hands down the Wii interface is better than the PS3's, thanks to the remote. I really enjoyed lounging on my couch with one arm flicking around pages. None of this mouse or joystick business. And finally when compared to using the PS3's controller the Wii is a breeze to type with. Granted it's no keyboard, but a welcome improvement.