I'm way behind on podcast listening and just recently got to the NPR show On The Media's broadcast from September 18, 2009. Here's the blurb from the story I'm recommending:

September 18th is the tercentenary of Samuel Johnson, whose Dictionary of the English Language was one of the first and most influential. His format – with head words, etymologies and sample sentences – remains unchallenged. But his standard – what dictionaries stand for – has been undergoing a slow but inexorable evolution, as OTM’s Mike Vuolo reports.

I found this to be an entertaining and informative expansion to things Grant and Martha have been telling us about for a long time, and I think anyone who likes AWWW will enjoy this very much.