"Also, Boing Boing itself is on one of the cards!
"There are also some live events coming up in New York and London, making it especially news-worthy right now - anyone can participate, as they aren't especially about PXC, just friendly puzzlin' competitions. Although the London event is closed to sign-ups, after 600 people applied..."
Link (Here is Guy's quick-start guide to the game.)
Mark Frauenfelder is the founder of Boing Boing and the editor-in-chief of MAKE and Cool Tools. Twitter: @frauenfelder. Come and hear Mark speak at the ALA conference in Chicago on July 1.