LaunchRock takes a while. While you're waiting for DNS settings to go through, adding a favicon (still not sure why that's required), you could've tried out 10 ideas.
LaunchRock is an amazing tool, but it makes you bring your own traffic to your idea. In addition, it's not the quickest thing in the world.
We envision LaunchSky to be an outlet for trying out your ideas to a sea of evaluators who are ready for evaluating them (and signing up as early users).
I think it has its uses but ultimately to me, votes hold no value because they aren't inherently valuable to a user. I would back projects all day long on Kickstarter with someone elses money but I have never backed a project myself.
Think about how downvoting on StackOverflow works. It costs you karma or points to downvote somehting, it's not free.
I think I would probably use LaunchSky as a way to make sure people didn't think it was potentially the worst idea they've ever heard of but outside of that I couldn't place any real faith in the platform for big ideas. I would probably limit myself to posting ideas which I felt I could build in a few evenings.