Have you heard about Google Googles yet? Take a photo and google will search and present the results.
Currently available for Android 1.6+, this new Google Labs service allows you to take a photo and Google will provide additional information about the place, wine, logo, artwork, landmark or book. Just imagine walking thru a museum or while on vacation you want to learn more about a location, simply snap a photo and learn more about it. Hope to see an iPhone interface soon.