From stuff.co.nz : http://www.stuff.co.nz/technology/digital-living/5530419/Unleashing-a-drama-nirvana
Interesting piece of the article, re: Game of Thrones..
"This epic fantasy from United States cable-television icon HBO is among the series Sky TV is believed to have been quietly buying for one of two high-definition channels it will launch after the World Cup.Sky isn't commenting on its plans, which may be unveiled this week, but it is understood one of the channels will have a link with HBO, as Sky's sister companies do in the United Kingdom (BSkyB's Sky Atlantic) and Australia (Foxtel's Showcase)."
So maybe this is what they're clearing channel 10 for?