Evolution Robotics posted a Youtube video demonstrating their ViPR visual pattern recognition software via the iPhone.
The demo video shows how you can take a photo of a Book, DVD, or CD cover with the iPhone's photo application. That photo can then be emailed to the ViPR server which will perform pattern recognition and then email you back information about the product. In the video, they take a photo of the DVD cover for Finding Nemo and got returned a description, Youtube link, and iTunes Music store link.
According to the video, they plan on releasing a native iPhone application come June.