Sky (sorry had to say it) has announced an online streaming service (Fan Pass) where you can either pay for a day ($14.99) or pay for a week ($19.99) - will allow you to access all sports channels.
No need for a monthly chare, can pick & choose what you pay for. But yeah, they do have you by the short & curlys.
More info here -
http://www.skytv.co.nz/Default.aspx?tabid=1920