Gnizmo on 12 August 2009
No, it can't. It is locked out of resolutions higher than 576p to the best of my knowledge, and might not be able to even go that high (I am unsure of PAL TV standards). It was a deliberate decision by Nintendo. The GPU itself is capable of outputting in HD standards as I recall though. So with a firmware update you could have the Wii capable of outputting in HD, but as of right now it is absolutely impossible.
