when there are issues with registration servers it is not always possible to give timescale on the fix, but it will be a proiority as you have been told. In fairness you don't have to register for sky digital do you?!? you are not comparing like for like IMO. You will find that all ISP's experience problems from time to time with servers, it is unfortionate that it has happened when you are trying to register.
My advice is to hang in there as it should hopefully be worth the wait when they get you running - enjoy the speed when you get it
