The Wii can also show YouTube
I have a Wii game consol. My Wii also connects to the internet. Nintendo now provides free access to open internet pages. It works a bid comparable with Net TV but the Wii does play FLASH on the open internet pages. For YouTube I use the http://www.youtube.com/xl version, nice for use on big screens.
Regretfully, the Wii game console does not have HDMI connection, so the graphics on internet pages are not as sharp as when I use Net TV. It is terrible to use the Wii controllers for internet browsing. Also in speed it does not beat Net TV.