In the new version of Google Mobile App just tap on the camera button to search using Goggles. Goggles will analyze the image and highlight the objects it recognizes — just click on them to find out more.
Computer vision is a hard problem and Google Goggles is still a Labs product. It works well for things such as landmarks, logos and the covers of books, DVDs and games. However, it doesnâ€™t yet work for some things you might want to try like animals, plants or food.
Awesome, and on the iPhone.