The Wii Speak Channel can be used again, thanks to combined efforts with RiiConnect24 and Wiimmfi. If you have a Wii Speak, you can register Wii Friends with RiiConnect24
and chat over Wiimmfi. You can also send voice messages to other users via Wii Mail, even if they don't have a Wii
Clicking the blue button above will take you to the download page of RiiConnect24-Patcher. The Windows version of the tool has an option to download and patch the Wii Speak Channel.