I've been working with a couple of friends on a new website to launch very soon, hopefully at the end of April. I won't even call it a start-up. So far, we've invested $50 into it.
But, the excitement factor is what appeals to me as to whether there's a need for this site. And whether people will love it or diss it. I think it's better to try it and see what happens, than forever have regrets.