Also i propose to open here a thread about Gradle because in fact it's a deployment tool (which i of course using) written in groovy and use groove as a language to do things during deploy or for deployment.
I think this kind of thread will be helpful for lots of people.
I think that's a good idea. The Gradle documentation is located at http://gradle.org and is very thorough.
Gradle is currently used to build pure Java projects like the Spring Framework, Hibernate, and more. In fact, at Google I/O they announced that in the future even Android projects will be built using Gradle, which is quite a statement given that Groovy doesn't even run on Android.