http://www.sermo.com http://www.sermo.com does this for docs - docs talk to other docs, and pharma companies and hedge funds pay hundreds of thousands of dollar

http://www.sermo.com http://www.sermo.com does this for docs - docs talk to other docs, and pharma companies and hedge funds pay hundreds of thousands of dollars to eavesdrop and seed specific questions they want answered. (The sign-in page restricts randoms to MDs and DOs to register.) It's a brilliant business model.