Just got a letter today, about a free replacement for our existing hd box. the box is supposed to be 3d ready aswell.
you can either go to http://www.sky.com/myboxhd
or call them on 08442411386
the offer expires 23rd of june.
I'm not sure of the exact details of which boxes are getting replaced and which are not. however i do have a free phone number which you can call to see if you are illegible. the number is 0800 0466434. calls from a bt land line or any payphone should be free, calls from mobiles and other networks can cost you more, for full details please check with your service provider(did i sound like one of those competition rules announcements?)