www.justanswer.com
this is a free market lesson for all of you out there. According to the principles of free market, a person is trusted or gains trust because money (or some other type of real resource) is on the line. Therefore, whenever reputation and money are on the line, a person will act in a way that encourages the highest degree of trust. But because yahoo answers is based on meaningless yahoo points and not money, you'll get useless and idiotic answers, most likely ones not even having anything to do with your question.
and once again, because money is not on the line, I could care less how many people give me a thumbs down. See, we're learning