1. Since Beast is new, there are not a lot of examples. Benchmarking is going on and it will take some time. In the mean time, you can take a look at how to write beast build files.

2. You can use it for any project you want if you know what are components of your project depend upon what other components. So as I see it, gradle is a build system for Java project in itself. Beast will not be using gradle if you are trying to compile a Java project. BUT.... you can for sure call `gradle` command from inside the beast.build file. Wherever build.gradle file is stored. So that in this case, beast provides you with an easier to use build system. Let us see an example:

In your beast file, you can have something like:

  build hello:
     ! gradle -q hello

and inside your gradle file:

  task hello {
    doLast {
      println 'tutorialspoint'
    }
  }

Hope that helps