Not sure if this has been advertised anywhere but the way the 3D channel works has recently changed. If you have the Entertainment Extra package as well as HD, you can convert it to EE+ which lets you watch the non-sports/movies part of the 3D channel and is £5 cheaper. You lose the F1 channel if you do this though.
That is how I understand it anyway, hopefully someone can confirm this
Can be done over the phone or online via My Sky and usually activates in 10 or so minutes although they say it can take 24 hours.
No use to the full package peeps but good for those that don't like sports and have alternative methods for films, which would have the EE package.