This feature was actually descoped a bit to remove group descriptions - they will probably be added in a later release. (I'll get the feature description on the web site updated with this info later today)
Verified. Can create a new group by specifying group name, display name and root password.
version:beaker-server-redhat-0.1.14-1.el6eng, beaker-server-0.12.1-1.git.133.6c74a92.el6,beaker-0.12.1-1.git.133.6c74a92.el6