I just heard about it too. We'll be in Disney and will be the second time we're lucky enough to be in the area when a shuttle takes off.
Unfortunately, they scrub the takeoffs very often. We actually never go to see it the first time because the cancelled the first launch & rescheduled for around midnight. We didn't bother staying awake because we figured they would cancel it too.
They didn't. The people in the area said it's a site to see when it takes off at night. The sky lights up.
We're going to try to drive over to see it after making sure it's actually going up.