I remember an old post from back in the day about that effects processor BT used where he moves his hands through light to create stutters and whatnot?

I remember someone found a peice of equipment that did almost the same thing but was more for flange and phaser time effects, but it was a small squarish style peice with a circle in the middle and depending on your hand , effected the sound effects.

anyone have any idea what this was! hope to hear from yall

It was called an Eyeris, from memory. Brian flipped out when Carlos (was it Carlos?) showed it to him so he got, did his own plug-ins and played with it. Dude didn’t bring it down under though when he came in ‘04. I haven’t seen any performances with it ("seen" = seen on YouTube or the like)

I looked into getting one just for novelty’s sake as well but would’ve had to import it which was just a bit much for my financial means, at the time.

According to Wikipedia, the first D-beam controller came out with the Roland 505 back in ‘98.  Brian let me fiddle with his during his show at the Crescent Room in Atlanta a few years back.  The think was pretty funky.

I think marshall is thinking of the Alesis AirFX.  <----clicky clicky for picky picky

Arguably anyone with a reasonable degree in nerd could build pretty much any physical controller they would like using an Arduino:

http://www.arduino.cc/

Tutorials and resources abound. For instance, perhaps you would like a midi controller monkey. So that you can do things such as.. I don’t know, spank your monkey, or stroke your monkey:

http://www.makezine.com/08/diycircuits_monkey/

While I found the idea of his light emitter controller intriguing at first, I quickly realized it was the visual equivalent of a reach around. Now, if he had to say, fling himself full speed into different sections of wall in order to change to a different cell in Ableton, that would be slightly more impressive. Especially as the night wore on.

Oh and if your looking some badass:
http://www.vimeo.com/flight404/videos/page:1/sort:newest
of
http://www.flight404.com/blog/

Compliments of the Processing IDE. processing.org
And not all that hard.