I just thought that it might be interesting to have a folder called "hands on projects" or "cacharreo" (excuse my spanish but I find no traduction for this word... ??? David any ideas?).
In it, we could share how we are working with arduino, or just how we or others are hacking electronic stuff. This could be a nice way of sharing ideas, and multiplying their uses. Like a "hardware library" or something.
As a first entrance, let me point you to some guys that have taken a bunch of toys, and explored how to make low tech sensors and actuators from them. It's pretty neat! There is a downloadable pdf file at: http://lowtech.propositions.org.uk/
Let me know what you think!