I am very excited about the forthcoming release of the 1939 register by www.findmypast.co.uk which should occur sometime in 2015, as long as the release date does not get pushed back. Perhaps the launch day will be 29th September which is the anniversary of when the original was taken 76 years ago?
I do have a few concerns surrounding the publication of the data, mostly related to how you will go about proving that someone has died (persons who would be under the age of 100 now and not recorded as deceased will not be visible without proof that they have passed on).
In any case, it should help a lot of people get into genealogy. I will review the register as soon as it is launched.