Whether you're looking for a factual answer, a theoretical one (the chicken or the egg comes to mind), or just advice, ask and answer questions up your alley on web site Fluther.
Once you've joined, start personalising your profile by adding areas you're an expert in, hobbies and interests you enjoy, and places you've lived. The site uses that information to automatically add new questions to your "questions for you" section. Not interested in a question that's showing? Just click on "not interested" and you'll no longer see it. Fluther is hand-tailored to you the more you use it.
You're not limited answering questions through the site, either. Add the Fluther bot to your instant messenger (AIM or Gtalk, with Live Messenger and Yahoo Messenger in the works) to get questions and give answers on the fly. Thanks Will!