Better Screen Shots
Add better screenshots, you can ask your users to draw something better, the application worth much more.
Seems you are a good programmer, but not a good painter! ;)
Please send me your skethes at livesketch[at]rabovik.ru. The best screenshots will be used on the app store.
Dont need better sketches, just more of them.
Leonardo Boiko commented
Here’s a great example of what an artist can do with livesketch: http://www.youtube.com/watch?v=pp8h97oCrX4
Perhaps you could try to contact the author =)