At the bottom of the home page, there is a "Customize this page" button. I tickled that and was able to move the different boxes around. Here's the top of my Ancestry home page screen (I didn't click on the KFC ad, though!):
As you can see, I moved the Search box to the top of my screen, and I added several links to the right-hand side of the screen.
Here's the bottom of my Home Page screen: