Apple.com: A New Design

Apple has taken advantage of the WWDC and the in-depth presentation of Leopard to refresh the design of its website.

The aqua-style tab bar is gone and replaced by another tab bar featuring a Leopard-Style version. The US Apple Store has also been updated to this new presentation. Local Apple Stores worldwide will mostly be updated during the day/night.
You should have a look at the new Apple.com and of course the Leopard-dedicated section.