Facebook makes it easy to hide posts from people on your NEWS FEED page.
If you goto hide someone’s posts and accidentally hide an Application, don’t worry, you can Un-hide it. This happened with a friend recently where he hid the iPHONE posts and wanted them back.
Simply goto the NEWS FEED page and scroll to the bottom. In the right bottom corner is a link that says “Edit Options“. Click on that and you’ll get a popup that has options for Friends and Applications (the first time you try the link it might expand older posts…just scroll to the bottom again and click the link again). Click on Applications and then Add to News feed