For those interested, there's an exhibit at the Harold Washington Library entitled "Official and Unofficial Photographs" from both the 1893 and 1933 Chicago World's Fairs. It's located in the Special Collections Exhibit Hall on the 9th floor and runs through March 2, 2014. The CPL has an extensive collection of World's Fair material with over 2,000 photos of the 1983 Exposition. I visited yesterday and gave it 2 thumbs up.
Here's a CPL link to their events offerings.