Neat. I'm going to launch a site where you post an idea to see if it's worth posting it to LaunchSky to see if it's worth posting to Kickstarter...
Seriously, though, I don't see how that's not already handled on Kickstarter. If there's not enough interest in your idea it won't reach its funding goal. What's the point of a pre-screening step?
Well, that's an assumption we're testing: early adopters / curious viewers / other entrepreneurs, will be quicker to give their support (and their email, through a secured gateway to the original poster) than their money.
We'll be investing in the traffic/exposure of those visitors and entrepreneurs, and hope this launch page can help get the creators there.
It could be used to find out if an idea is worth persuing and if it is, you could then go to kickstarter... that's how I see it.