I love this - it makes viewing images so much more engaging and interactive. Basically, it's an image viewer that uses your 3D card in your computer to display images from internet pages. Flickr, Google, Facebook are some of the site that are compatible. The name is Piclens, and it's good... so try it:
I would stick an image up to show you, but I'm on a 3G card and it's ripping the images to shreds!
Oh, on a Mac, it works best in Firefox - Safari isn't half as well implemented.