The second release candidate for the 1.1 line of BerkeleyGW is now available on the Downloads page. It has further improvements and bugfixes compared to version 1.1 Beta.
Disclaimers: This release should not be considered production. There are some rough edges here, including the possibility of bugs, sparse documentation and the potential for file-format changes in the future. Please use with caution and, at minimum, test your build using the testsuite (you should actually always do this).