What's Gradle?

My article a few days ago in Javalobby "Ant or Gant" had some very interesting comments. One reader posted about a new build tool which I had never heard of called "Gradle". To quote his comment here:

gradle is another java+groovy based build-tool
IMO gradle is clearly superior to gant.
it implements support for dependency-management
and some other really smart concepts.
check it out: http://www.gradle.org

As always, I didn't waste anytime once I saw this comment, and read the Getting Started and also Users Guide. It sure looks interesting. I will download Gradle and give it a try and share my experience. In the mean time:

Have you used Gradle? Share your thoughts?