After the mobile edition of Google Reader, Google launched an official iPhone edition of their Social links Reader. The new reader is optimized for a better experience with advanced browsers. This new version is designed to offer many of the same features as the desktop, while making it quick and easy to act on items. If you’ve used list view, then it should be familiar to you. Scan the titles for an item that interests you, tap and it expands in place. Starring, sharing, and keeping unread are done in place, so you never have to leave the list view or refresh the page.

iPhone link : http://www.google.com/reader/i/
Website : http://googlereader.blogspot.com/2008/05/brand-new-google-reader-for-iphone.html