Thanks for the input. I have some Python skills, so I just bought a Django book, I think that will be the fastest way for me to get something going. I haven't

Thanks for the input. I have some Python skills, so I just bought a Django book, I think that will be the fastest way for me to get something going. I haven't been this excited in a while. Not only do I need to learn a lot of new tech, I need to figure out a lot of the business/marketing side too. When to start trying to attract users, how to drive traffic to the site, how/if/when to bring in other developers. Any thoughts on how to determine if the idea has traction? Like number of users after a certain time or reviews/bloggers comments, or even gasp revenue?