This image of a "wanton gospeller" was found on the NY Public Library's Online Picture Collection, one of many reference sites deemed "best of" by the Machine-Assisted Reference Section (MARS) of the American Library Association, as reported on Search Engine Watch (SEW). I'm a reference site and book junkie (and yes, I admit to opening up the dictionary just for fun-or out of boredom- sometimes), and so was psyched to find this entry. See SEW's entry (Best Online Reference Sites) and the page from the Reference and User Services Assoc. website, MARS section (Innovative Web-Based Reference Services).
Selection criteria include the site be free to use, presents the service in a creative and functional manner (so glad there are some people that still care about good user interface!), and is adaptable to any library.