updated 12:30 pm EDT, Tue July 15, 2008
Nintendo at its E3 press conference today introduced the WiiSpeak, a microphone add-on for its Wii game console. The device is designed to lay on top of even flat-panel TVs and lets users participate in multi-user chats during games, including Animal Crossing: City Folk. Nintendo hasn't said whether the chat function will be available outside of games but notes that it's limited to existing Wii friends.
The WiiSpeak should be available along with supporting software sometime during the fall and will sell for $30 by itself rather than as a bundle