I was wondering why my Wii was staying warm even after I shut it off. I then remembered the Wii setting for standby mode where it will check for messages from the Internet even when the Wii is not on.
I then turned the standby option to off.
Shut off my Wii and noticed the power LED was now RED.
I felt the Wii after 15 minutes and it was cool to the touch. So now I know why it was staying warm, it was checking the web every now and then for messages.
The only thing about turning this off is obviously the slot won't glow blue until you turn the console on when you have messages. No biggie for me as I don't use my Wii for communication. I have a PC and use email and IM.