To me, off the top of my head, I'd say you need to first focus on the community that you'll be targeting. People want something better that makes their life ea

To me, off the top of my head, I'd say you need to first focus on the community that you'll be targeting. People want something better that makes their life easier. I think the bigger challenge you'll have is the credibility of responses. I'd almost suggest a way for people looking for an answer to evaluate the answers they've found. I'd take a look at www.qaboom.com. A similar idea, but it is targeted to students. The question I would ask myself, is, who are the early adopters. If you have some early adopters, what is going to make it worth while for them? What if the person tags their question with a category and another person subscribes to the RSS of that category...being able to see what others are asking and then seeing the real time responses is going to be powerful. Just some thoughts. I'd love to be a beta tester for you. Let me know. Honestly, you might want to look at a model like about.com. Find some experts who already belong to a community and give them a % of revenues. just some thoughts, I think it is a great idea! Good luck with it!