Zite is probably the most-used app on my iPad. I love the way it crawls hundreds of thousands of news sites for the stories I am going to find interesting. It's a bit like Pandora for news, and I can give any story a thumbs up or thumbs down while the app constantly tunes the news choices it brings to me.
iPhone owners, your day has come. Zite is now a universal app, and it is terrific. If you signed up for a Zite account on your iPad, your preferred topics will appear on the iPhone version when you log in. If you're a new user, Zite will ask for for subjects you're interested in, and you're good to go.