First of all: Gosh!
Ryan did it again! Collapsing my brain with brilliant effects... Arg!
After seing first possibilities, I thought a little bit like Krash: Vibrating the mesh of the main tunnel in response of the music. Animated textures will be great (cpu computation or inside the graphic card?)
Or, coz pulsing wave are missing ;-), could be possible to have the good old wave pulsing by following the path of the camera. Or may be some options like in Geiss plugin responding to the bass beat (a option) and blow some light torpedos through the tunnel!
May be key options could be linked to beat or bass detection? This could give hairs/wireframe/darkness appears/disappears into the rythme.
Great job, Ryan!!!