Discovery’s rollout to the pad seems to be postponed. I just read on a a news source that thunderstorms have caused some delay, so that the rollout will now happen on Sunday, 6am. I wonder if some of the work scheduled at the pad will now be done in the VAB…
Source: http://www.raumfahrer.net/forum/cgi-bin/YaBB.pl?num=1173608035/537#537