I agree. Given the choice, I'd rather encourage people to use products like Mozilla, as a 'I'd rather give to a community than help boost a corporation'.

I do it because it's only fair to me to give back a little (even though I have a family etc) to those who have given so much.

I want my N-bomb! BTW, I think that "chemical" is really just electrical energy and that "acoustic," "kinetic" and "mechanical " are the same thing. (Heat is another story.)