Strange, this is almost like what I thought pvsh should be (http://news.ycombinator.com/item?id=4867883) -- you're connecting people who want things with people who are making them. Except instead of letting people generate ideas for entrepreneurs to jump on, you're asking entrepreneurs to lift their skirt before they're ready for the dance. Also, you don't have the monetization I'd expect (or at least you're not talking about it yet).
Edit: I just realized that "If you sign up now, you’ll get to submit your first idea free" implies you're monetizing the entrepreneurs who use the site -- so all content is paid content.
The monetization isn't finalized yet -- we're getting feedback now (mostly with this post).
Our hunch is to charge a minimal amount for each idea submission; something significantly less than the money/time/effort for a splash page / domain / launchrock / ads. The early adopters would never pay; we instead need to figure out a clear way to incentivize them to come to each idea, the dashboard of ideas in general, and back again.
Edit: I just realized that "If you sign up now, you’ll get to submit your first idea free" implies you're monetizing the entrepreneurs who use the site -- so all content is paid content.