"Adapter Switching" option which powers down the wireless radio when a wired ethernet connection is detected

[John Walicki <walicki us ibm com>]

In the Intel ProSet utility on Windows there is an "Adapter Switching" 
option which powers down the wireless radio when a wired ethernet 
connection is detected.  The wireless radio is powered down when the 
ethernet cable is inserted and the wireless adapter is powered on once 
again when the ethernet cable is removed. 

Normally, a dual homed environment with both wired and wireless having 
assigned IP addresses is preferable.  Routing will send the packets over 
the preferred interface.   We're constrained by the available IP range for 
wireless devices and only want to assign the IP address if the laptop is 
untethered.

Is this possible with NetworkManager?

-- John Walicki