Alex Chitu over at Google Operating System noticed a new feature in Google News. Look to the top right corner and you'll see a link for "Add a section."
Clicking on "Add a section" takes you to a directory of news sections that you can use to customize your Google News experience.
Update: You can also create your own sections and either keep it private or make it available for public consumption. Here's how you do it: First, click the "Create your own section" button in the right sidebar (when you're on a sections page):
On the next page, choose a title for your section and then add relevant keywords. As you do, news related to those keywords will appear on the right. This will help you know if you're choosing the right keywords. Finish filling out the form. If you check the box for public view, you'll need to add a description and select a category.