Have any existing customers been able to upgrade to HD free/cheaper at all? A friend wants it but is having trouble getting his other half to agree that £10pm is worth it!
As peeps have said, there is Quidco to be had.
Just a heads up though, I think Sky will try and charge you £60 for the upgrade to HD box, but only either online, or over the phone (can't remember which). If so go for the other method.