I predict two new spinoffs (names will be different):
- doctoroverflow.com: Ask questions about your medical problems, get answers from strangers on the internet INSTANTLY.
- lawyeroverflow.com: Why pay hundreds of dollars to a lawyer for legal advice? Lots of people on the internet know every aspect of the law! (Just look at the comments to any news story about intellectual property rights.) Why not let them answer for free, and the payment will be in the form of their massive rep.