Nathan sez, "Aaron Barnhart, on his excellent TV Barn website, took some photos of Berkeley Breathed's Comic-Con lecture. Including some shots of cartoons Bill Watterson sent Berkeley throughout the years. (The congratulations to Breathed on his Opus holiday special poking fun at the Charlie Brown Christmas Special was my personal favorite.)"
Comic-Con 2010: Berkeley Breathed and the Piano Thing
(Thanks, Nathan!)