A developer currently working on a FPS shooter for wii which can be playable on the opera browser.
"Geekrecon has been hard at work adding more graphical functionality to the Wii Opera SDK, and thought he'd create a demo to showcase some new changes. The result is a simple FPS demo engine (well FP minus the S). It works on the Wii using the Wii Remote for forward and backward motion and turning to look. It also works on basically any non IE browser but without controls (automovement instead)."