I think it's strange the App Store download button leads to a popup for my email address. I would have gone the LaunchRock route for something really quick and to the point.

Also if this is your official landing page for the app, I would do something much larger. Add more screenshots and detail on what the app does...you have to lure people in and convince them they should waste 5 minutes of their time installing your app.

Otherwise, cool idea if it hasn't already been done ;)