Links!

Building Stuff:

Effect Pedals -  Schematics for Guitar effects pedals.

Fiberglass Sub Box - Sub box in your spare tire well.

Fiberglass Sub Box  - Sub box for your SUV. Fits over rear wheel well nicely.

Electronic Drums:

Beatniks' Electronic Drums -  Instructions for triggers, variable footswitch for hihat, guitar pedal boards.....

DIY E-drum kit - Rack and pads made out of PVC pipe and Remo Practice Pads.

Laptop Drum Set - This guy made some e-drum kit that sits on your lap.

Midi Controllers -  Lots of plans for midi controllers.

Parts:

Ampwares  -  Guitar and Bass amp parts and coverings.

Precision Drum - Every drum part you can think of they have, even shell covering. Real expensive though.

Manufacturers:

JL Audio -  JL's site. it has some tutorials. 

Other:

B!  -  This site makes fun of this kid Brian that we call B.

Derek Erismanns Art Page  -  This site displaces Erismanns' Killer Art.