1. If you mean in the Wii Options area, like Channel & Save Data then I haven't seen anything around that can do that, could be wrong though.
2. OK, select the Wii Options icon from the bottom left of the screen on the Wii System Menu;
Click on Wii Settings option
Click on the right arrow
Select the WiiConnect24 button
On the WiiConnect24 title screen, click on the WiiConnect24 Standby option, then select ON or OFF
Now select Confirm, now your Wii should power off with a Red light instead of a Orange light