According to Code Line, also available are elements which offer Exif data, camera settings, a Loupe View with high resolution zooms, and a large Histogram to see the blueprint of your shot. If the photo is geotagged, you’ll not only see the coordinates, but a nifty map of where the picture was taken, and a link to a more detailed map online.
QuickLook is the feature in Mac OS X Leopard and Snow Leopard that offers a preview look at files by simply selecting it in the Finder and hitting the space bar. SneakPeek Photo is a plugin for that feature.
The software is priced at US$10, and there is a 15 day trial available. SneakPeek Photo is compatible with Snow Leopard.
A screenshot of SneakPeek Photo in action. The additional information displayed is above the photo.