EdCrowd is a new (alpha) site for asking questions and getting answer from other anonymous users. This site reminds a lot of Aardvark another site that offers similar type services.
However, EdCrowd does stand out a bit that the more a person answers/post questions on their site the better the chance somebody will vote on it and alter their "reputation". Think of how karma works in Plurk and you'd be on the right track. The higher a person's reputation is the more options that they have.
Give EdCrowd a try if you want a more interactive type of discussion board by clicking here.