
We have sky multi room too, and my daughter has another box in her room too as our normal reception is rubbish. It is shared through one of these splitter thingy's with her sister ( the wireless thingy) and they do have to watch the same channel but it works quite well.
Be very careful getting multi room - since getting it this time last year I now disappear into my bedroom as soon as I get in from work - between that and CD I never get a thing done :D don't say you weren't warned!
Marion