At about 9:45 AM PST I noticed (see image below) that the Apple Online Store was showing a message that it was down for updates. Not sure if this is just a routine update or if something major is being added. Stay tuned.
Update: Oh well. It’s back up and I cannot see any major updates. I got excited there for a minute and thought maybe we were going to get a little pre-MacWorld treat. Looks like this was just a routine update after all.