"33" Breath Controller

I'm still a little unclear as to what exactly is going on with this breath controller...
Unfortunately, it's not a breath-controlled "Ebow" effect as I was hoping.
Rather, it's a MIDI controller that combines breath control with essentially a joystick (X-Y control).
Johan Haake, the brother of Meshuggah's drummer, originally built these back in 2002 or so. Frederik Thordendahl, one of the guitar player's in Meshuggah, was using a Yamaha breath controller but wanted something more performable, and Johan asked if he could give it a try.
There's a lot of great info, including development history and schematics, at Johan's site: http://www8.tfe.umu.se/personliga/jh/index.html.

Here is a pretty good demonstration video (not by Frederik Thordendahl):

Here is an example of it being used in a Meshuggah song for a guitar solo (starts around 2:40):