The New York Times has just launched a photoblog, called "The Lively Morgue," to showcase its insanely large photo archive.
How many [photos are in our collection]? We don't know. Our best guess is five million to six million prints and contact sheets (each sheet, of course, representing many discrete images) and 300,000 sacks of negatives, ranging in format size from 35 millimeter to 5 by 7 inches -- at least 10 million frames in all. The picture archive also includes 13,500 DVDs, each storing about 4.7 gigabytes worth of imagery. [...]
If we posted 10 new archival pictures every weekday on Tumblr, just from our print collection, we wouldn't have the whole thing online until the year 3935.