you need to connect the Wii (or ps3 or xbox 360 whichever system you decide on) to the TV via "HDMI" cables. Quite specific, and I bet no one sold you one. They dont provide them generally when you buy the tv and they're essential for any kind of 1080 hookup, which all the games run and some of the streams too. nYou also have to do a litle programming for the tv to talk to the wii and the wii to talk to the computer. btw Dont get ripped off, Best buy will try to tell you you need to spend 80 bucks for the right cable and they all lie boldfaced about it. You can get the proper 6ft hdmi for between 5-20 dollars. Dont spend more. You also have to connect the wii to the computer via ethernet cables. (the out from the wii to the in at the computer. These are bigger and thicker than regular phone cables and have little lights on them that glow when they're hooked up. That's how you get the streaming service to your flat screen without a wireless setup.
What do you use for internet? Dial up?