@everyone that asks for release dates: we don't have them! We have for sure a timeline we would like to follow... but we want the freedom to say *screw that* and release weeks before or after without people complaining, if there are valid reasons. So, unless everything is pretty much finalized (ie. coming out in 1 week or so) you won't have a deadline from us, sorreh.
I've been trying to get it too get it to work in creative, and it's not. Do I have to do it in survival?
Currently, the nether reactor will not activate in creative for the same reason as TNT. It is because they do not want to bring bad gameplay to the game. Eventually they will create an option for you to opt this in, but that will be later on after all the important features have been added.