RiiConnect24 is a custom WiiConnect24 replacement. Server status, and other updated content can be found at rc24.xyz
Currently, these services are working with RC24:
- Wii Mail
- News Channel
- Forecast Channel
- Everybody Votes Channel
- Nintendo Channel
RiiConnect24 works excactly the same as WiiConnect24 previously did. You can register each other using your friend codes, and send each other mail and Miis.
For the complete installation guide, see this.