As reported by Joystiq, Nintendo’s announced the Wii Speak Channel in California this morning.
According to NoA’s Cammy Dunaway, up to four people can chat together, and the Wii Speak microphones will come with a coupon to download the channel.
No launch date was given. More through the link.
Update: This Kotaku report says it’s launching next month.
Update 2: It’s out on November 16. Says so on Shacknews.