We've added a new feature to all product pages.
If there is more than one image available for a product, they will now show as thumbnails when you move your mouse pointer over the image. Moving the mouse pointer off the image will hide the thumbnails again.
Clicking on a thumbnail will show a larger version.
The product photos page ("zoom/more images") is still available by clicking on the main image, or on the link. We've added similar thumbnail features to that page as well.