I thought I was familiar with all Google Services, but actually not. Google Answers - very interesting and worth looking into service. If there is something you're looking for, but can not find on the Internet - you can ask others by paying for the answer. Google uses independent contractors that are knowledgeable and tested by Google. You can ask pretty much anything - scientific, professional, personal or health questions. Of course Google doesn't take responsibilities for the answers and disclose that health related answers can not be taken as professional advise. I looked through some Web Promotions related questions and found very interesting, extensive and thoroughly prepared answers. Anyone can read and comment answers for free. I think you can find a lot great advise on any subject at Google Answers.