Update: Store Back Online (1:00AM PST)

The store is back up and online, with a laundry list of new products including:

• iPhone 3G
• MobileMe
• iMac upgrades
• 16GB iPhone
• 2GB shuffle

UPDATE – None of these have been updated. False alarm.

Apple’s online store just went down, a definitive sign that they will be launching a new product overnight. It could be the iPhone App Store, which will launch sometime this week (developers had to submit their apps by noon today to be considered for the launch), or it could be a rumored new Macbook/Macbook Pro product.

Apple loves to launch products on Tuesdays. Expect whatever it is to go up around midnight PST. Our guess is this is not the new App Store, because there’s no obvious reason to take the store down to launch new software. A new computer? Definitely.