You built it! awesome! I can't tell by the survey monkey landing page you set up. Looks like some awesome graphic design work though. Post to HN when you are ready to launch, not just to gather emails.
We are gathering emails to see how much signups to expect at the launch time. And then prepare our app/server for that type of traffic.
As a HNer, I know it sucks not being able to directly try the app. But we figured this was a necessary step to take :)