Google has created an app called Google Goggles that lets you use pictures taken with your mobile phone to search the web. It is designed to enable searching for things that aren’t easy to describe in words. Typing or speaking your query is not necessary – open the app, snap a picture, and wait for your search results. Google Goggles works well with certain types of images (books, landmarks, logos, artwork, text) and not so well with others (animals, plants, furniture for example). This free app is currently available for Android devices running Android 1.2 or higher and iPhone 3GS and iPhone4 devices.
Google Goggles app