Image Swirl combines the technologies of a regular image search and the recently Labs graduate “Similar Images”. The search interface also uses the Wonder Wheel which makes it more interactive. The results are shown in stacks of similar images. When a stack is clicked, the wonder wheel shows up with thumbnails of other related images around the selected image. You’ll also see the path of your search which will help you get back to the root of your search.
Currently, there are more than 200,000 queries for this Labs experiments and Google promises to include more in the future.