Hack: Tons of Camera Hacks

http://www.camerahacker.com/directory/Hacks.shtml

Some of these would be cool to try and test out with my cameras.

I would like to try:
Building a Bicycle Camera Mount
Building a Car Camera Mount
Making a Pinhole Lens for SLR Cameras
Using auto teleconverters and auto extension tubes with manual lenses - Overcoming the Canon EOS blinking battery symbol.