From Sonos' website:

"ENJOY SONOS IN MORE THAN ONE PLACESonos offers support for more than one household so you can easily enjoy Sonos wherever you have access to a Sonos system.
Select Add Another Sonos System from the Settings menu when you are prompted to connect to a household. Once you add the household, it will automatically connect as you move from one place to another.
To remove a household from your controller, select Forget Current Sonos System from Settings -> Advanced Settings."

Finally

Excellent... any word on the max number of households?

This is something I've been waiting on for a long time for a number of client's, but if it works with many systems it will be very useful for us installers too.

 

Not sure on total, more info here:

[Link: sonos.com]

In training they also mentioned the ability to have multiple systems within one house by using two different Bridges. The idea being a kids system and the adult zones. I don't see any mention regarding this or even how you would control it within the same LAN.

edit

Two systems can exist on the same subnet each with their own controllers and not interact with each other. Example from a job we did

Main house 8 players and 2 iPad minis
Exercise/caretaker has 2 players and 1 iPad mini
Guest has 3 players and one iPad mini

All on the same subnet yet they don't see each other.

So kids would have their players and control from their phones or dedicated iPad and the Adults would would have their own players and controllers.

I could see the adults having control over both systems for the times when jr runs the volume too loud.

I've updated my own Sonos iOS, Mac and PC apps to 4.2, and for the life of me, I can't find the multiple residence stuff under settings. Am I blind?

Great to finally see this! I would like to know if there's a limit, eg can we as CI's have all of our customers systems paired with our phone controller? That will be very convenient if so (I guess we'll probably find out pretty quick if there's a limit this way :P )

The adult / kids system sounds interesting, anyone played with this yet? I assume controllers in the "parent system" can still control the kids system by not vice versa?