Short a piece, natch.
So I called the customer service number they provided and a lady with a thick Texan accent answered the phone and...
Lady: How may I direct your call? Me: I'm missing a game piece. I'm not sure where I'd be directed for that... Lady: Is this the Blokus game? Me: Well, yeah. Lady: Okay, here's what I'm going to do. I'm going to redirect you to a voicemail box where there won't be a message. When you hear the beep, leave your name, address, and a description of the pieces that are missing and we'll mail them to you. Me: Um... okay. Lady: Here you go. *beep\*
There's a missing piece hotline for this game. Yow.
We played anyway last night, faking the missing piece with a slip of paper, and it was a lot of fun. I recommend it, but keep the instructions around - that's where the missing piece hotline number is.