As said just now by Major Nelson. All you have to do is turn on your Xbox and you will instantly download NXE to your 360. Have fun.
Instead of adding another 10,000 people to the preview program like we did last week, we’ve decided to do something a little different: everyone who successfully applied to the preview program (and had a valid console ID) will be getting the New Xbox Experience sometime within the next few hours. That’s right…we’re hooking everyone else up with NXE a bit early. If you signed up and are not prompted, that means you did not enter your console ID properly and you’ll have to wait until Wednesday.
Don’t worry, it’s almost here.
Thanks again for your overwhelming interest in the program.