I have 3 suggestions for improvements of the ant copy-dependencies process (or 2 suggestions and one question=
update maven-ant-tasks to the current version (2.1.3)
the maven-ant-tasks jar shouldn't be in lib (since it is not a dependency of jbehave) maybe if should be in a subdir ant
is it intentional that the binary distribution doesn't contain any binaries? It just downloads the jbehave jars along with the dependencies.