He's also far and away the most knowledgable regarding Pence variants across all publishers, indicia variants, U.S. price font variations etc. He also has a wealth of knowledge about Marvel newsstand price variants (1999-2000), Canadian price variants, and Australian price variants. His research and cataloging are very impressive, and have been mentioned in Overstreet and elsewhere.
I'd also add @AJD for all things Australian, @G.A.tor for Centaur (and the G.A. market in general), @lizards2 for fish-in-the-face covers, and @nearmint for statues. I'm sure I'm missing others.
I lurk more than you think, and love taking in all the knowledge here on the boards