Thank you very much for the above information. I rang the number as suggested: 0800 112 396 (ask for Alison: she was awesome!).
It took a few tries to get through -- the first few times I would hear silence and then a dial tone. On my fourth attempt I received the following deal:
MySKY+ decoder: $10 per month (half-price).
SKY Basic: $23.83 per month (half-price).
SKYwatch Magazine: FREE
MySKY "joining fee:" $25
The above deal is for 12 months. Caveat emptor: early termination fee up to $376!
NB: SKY had no MySKY HDi boxes available (half-price @ $7.50 per month). The only difference is MySKY+ has an additional 30 hours recording time.
I hope my summary helps out any others considering the deal we geeks received.