I'd like that network manager switch off automatically wireless connection if not used or if a wired connection is enabled.
When I insert the cable, I'd like that Knetwork manager automatically switch off the wireless in order to save power and to avoid confusion between the two network.
Another useful behaviour could be switch on the wireless if I unplug the ethernet cable.

Do you like this idea?

Thanks,
Donato

This may not be desired in some cases, however you can manually disable the wireless connection if desired ( by unchecking the box in the Network Management Applet )

I agree... It should be an option.