Switch the OS X Sonos controller between different households and customer IDs without resetting + pressing buttons all the time. Using load will politely restart Sonos.app to make the changes take effect immediately.
./polysonos save [name]
./polysonos load [name]
NOTE: the new sonos controllers (in beta as of 4/2014) appear to possibly natively support switching between multiple systems: http://www.sonos.com/newcontrollerapp