The picture was made with the Canon 5D mark II and a 400mm-lens. It consists of 1.665 full format pictures with 21.4 megapixel, which was recorded by a photo-robot in 172 minutes. The converting of 102 GB raw data by a computer with a main memory cache of 48 GB and 16 processors took 94 hours. With a resolution of 297.500 x 87.500 pixel (26 gigapixel) the picture is the largest in the world. (stand December 2009)
http://www.dresden-26-gigapixels.com/dresden26GP
(Tip -- instead of the keyboard arrows and +/- keys, use your mouse to move around and zoom in/out with the mouse wheel.)
BTW, I finally not only found Waldo, but also got his car's license place number:
Can you find him? (j/k)
Very cool stuff.