Don't sky now offer a service for apartments where if you contact them and tell them where you live, they will talk to the other people in your block for you and if they get enough interest, will set up a satellite service for the apartment block. Saves every apartment getting an individual dish which does look ugly. I think I read this somewhere anyway!!!
That's the way it has been set where we live. The TV point in the apartment has the 8 terrestial shannels by default but if we want to hook up to sky the mechanism is there for it becasue of some communal sattelite dish somewhere.