No. It is theoretically possible; however, as of right now, it is not possible. This is because there are no drivers for it, though someone could eventually make them.
Chat with our AI personalities
No you can't. You have to use the microphone included with the game to speak through the game.
Any USB Microphone
they're used for various accessories (Guitar Hero World Tour/Rock Band Microphone, Wii Speak Accessory, etc.) Or, if you've modified your wii enough, to use USB Mass Storage Devices. won't tell you how to modify it here, google it,
Most probably yes :D There are two usb Ports that are available behind the console. And check that the usb headset is compatible with the wii. In my own experience, i even use my own usb speaker to hear my music while playing wii sports :D Hope this helps.
Any microphone from any other game on the xbox 360, ps3 and wii. Because the microphones from these consoles use a USB wire, socket, thing... You can also use the headset that connects to the controller.