The makey-makey isn't going to arrive until next month, but I've created the kiosk style setup for it on the pi already.
Hopefully when it arrives I'll be able to plug it in and go!
Starting from a base install of 2012-07-15-wheezy-raspian, logged in as 'pi':
$ cd /home/pi
$ git clone git://github.com/dalethatcher/piboard.git