The "how-to" ad changed when they updated the ads without the AT&T info. It used to scroll through different music when in coverflow mode. Not a huge difference, just a little weird. I don't really know why they'd do that, but whatever. Here is the old ad:
http://youtube.com/watch?v=tH0-GKBmOE8
Compare it to the new ad.
http://youtube.com/watch?v=tH0-GKBmOE8
Compare it to the new ad.