This is exactly where I'm at right now. I just built a little prototype and right before launching I don't think the idea is going to pan out. Send me an email and let's chat.
I've been lurking this site for years. It's these comments that brought me out from lurking after spending the past 11 months building something I hope will work out. If you folks are interested in a google hangout, irc chatroom, I don't care, something... please let me know, too!