The new Library of Congress Information Bulletin for July-August has a profile, or apparently a re-written press release with a lot of pictures in it. Unfortunately, the LoC's website is way behind on loading these, so you'll have to see if you can scrounge a copy from an acquaintance who works in a library.
Here's the citation for those keeping track:
'Enduring Outrage': Editorial Cartoons by Herblock on display.
Library of Congress Information Bulletin (July-August 2006): 177-181