BerkeleyGW 1.0.1 is now available for download: http://www.berkeleygw.org/?q=node/6
Includes some bugfixes, in particular to examples.
The updated version 2 of our arXiV paper is also posted. http://arxiv.org/abs/1111.4429
That is the most complete documentation for users, since it contains some corrections and additions compared to the version in Computer Physics Communications.