Looks like Amazon is testing out a new site design.

A few facts from the about page:

What's different?
We concentrated on shopping, searching, saving, and buying--the four activities that customers have repeatedly told us are the most important to them. They're now prominently featured at the top of every page on the site.

Don't worry--we didn't remove anything. All your favorite features are still here.

Why do I see the new design on my home computer but not at work?
We're still in our testing phase, and you may not see the new design all the time.