The accompanying Tumblr for the theater-and-craziness-related web site, The Craptacular.
The best item I ever purchased at a Broadway show was a roll of toilet paper signed by the cast of Urinetown.
Window cards and posters are nice, but the best merchandise is creative and show-specific. I’ve compiled a list of 10 completely badass pieces of merch from current and recent shows. (FYI, this list also conveniently doubles as my birthday wish list.)