http://www.demo-it.net/wii-standby-mode/

Wii question?
Do I need to leave my wii on standby? "I can receive updates and emails, even if it shuts down? Can a Wii overheat and cause the CPU and GPUs not working?
You will be left blank in the orange light () in order to receive notifications such.Otherwise updates and will have to check manually making a connection test every time you use it. The Wii does not overheat as I leave mine in the state of alert at all times and during school holidays it gets a good workout and I havnt had any problems
Wii Lights