Below is a trailer for an upcoming documentary about the Cry Baby Wah pedal called Cry Baby: The Pedal that Rocks the World:
The full movie will be available in February 2011. The movie will feature appearances by Eddie Van Halen, Jerry Cantrell, Slash, Buddy Guy, Kirk Hammett, Zakk Wylde, Dweezil Zappa, Paul Gilbert, and more. Looks like an interesting flick!
I highly recommend the step up from the original Crybaby. It has much better response.