If anyone is considering Sky Broadband - all I wish to say is "RUN!!!!!!" as far away as you can from Sky. Their wireless broadband is truly crap. The signal is lost every 3 - 4 minutes and then takes forever to search for it again, reconnect for 3 minutes and then go through the whole process again. I am now sitting with a wire connected to the modem in order to send this message.
And another huge note of caution for their Sky+HD service - I just had it installed yesterday (yes, very stupid of me but this was their offer when I called to complain about my existing Sky box) and now I lose my signal on Sky TV every time I change channels! The box needs to be unplugged and re-plugged each time I change channels. The engineer that 'installed' the box simply connected the wires and ran like his pants were on fire. So now I am worse off having 'upgraded' the box. The tech people on the phone acknowledge that my box could be faulty but the engineer can only be booked for 3 weeks later.
I am jumping ship immediately - have already got my MAC for switching the broadband service.