This seems to be the answer to all questions related to Big Bother (deliberate typo) if you're not able to see it on your TV or device.
I spent two days waiting, expecting to find the signal on my Walka and I'm eventually sorted after investigating. The show's taken over the E! Mobile channel on the South African and Namibian Walka bouquets but it didn't happen on mine.
If the same thing's happening to you, all you need to do is press the "reset" button on the left hand side and it reloads with BB.
If you're having difficulty viewing the second feed on your telly, try the same thing. Our Cheesawasn't able to see the second feed, rebooted her decoder and it was sorted.
I've been able to access the second feed, except it takes ages to load. The first time I switched over I was almost going to leave thinking that the second feed isn't working but then it arrived. I didn't reboot my decoder to get it so I'm gonna reset it too to see if it makes things faster.
You can't see a second house on the Walka ... based on my viewing so far it features the main TV feed.