One Handed Mini-Clapper for DSLR Shooters

I recently discovered the AWESOMENESS of shooting in RAW with my 5D Mark 2, thanks to the wonderful guys at http://www.magiclantern.fm/!

While doing tests building my personal RAW post workflow, I found myself with the need to sync sound to the RAW footage. Many of my tests were handheld shots with a Tascam DR-100 on a hotshoe ball mount, so I needed a solution that I could operate with one hand.

Of course I could use an App on my phone and get all my slate data in one go, but where's the fun in that? =)