Re: Your signature. See here: http://www.youtube.com/watch?v=B-Wd-Q3F8KM Great example of transformative use and a wonderful classroom example.
If you can imagine it, you can build it, and who has more fertile imaginations for tool and toy building than Slashdot readers?"'Don't be surprised if your geek lover puts more thought into arranging the boudoir than you do, or if common household items soon take on a new dimension. More than one geek has told me that Home Depot is their favorite adult store.'
"Consider a spherical bear, in simple harmonic motion..." -- Professor in the UCB physics department