If you're following MVP/Lean Startup principles or preparing for launch, you should start gathering interest for your application.

In 5 minutes or less your new idea can start collecting e-mails (assuming you promote it). Easy to follow directions are included.

http://vouched.heroku.com <-- Example (actually this is mine. Vouched: Recruitment with Social Proof).

On github: https://github.com/maxdemarzi/Camel