I am not a fan of Yahoo answers at all. I've asked a few questions about finer points of etiquette and have received at least one incredibly rude response for each question. At least when I search on Wikipedia, I don't have to worry about my search for information being ridiculed.

wikipedia is great. disclosure i have used this many many many times doing my webct homework. However sometimes it is not what the professor wanted . Mine even replied to me via e mail she did not have a clue as to how to find the information needed to do our latest homework.