Proof #18 comes out today; first issue with Dave "Kelly's awesome buddy" Casey on colors. The Archie Snow backup is only two pages long, it's called "Rodomontade" (Google it, it's my favorite word) and it's drawn/colored by Riley Rossmo to thank me for drawing Proof #17 for him.
Proof #18 preview at CBR.
(Guys, guys, did you see the trailer for Where the Wild Things Are? DID YOU SEE IT)