We are very excited to release Bro 2.1 today. See the download page for the source code; binary packages will come soon.
Bro 2.1 comes with extensive support for IPv6, tunnel decapsulation, a new input framework for integrating external information in real-time into the processing, support for load-balancing in BroControl, two new experimental log output formats (DataSeries, ElasticSearch), and many more improvements and fixes throughout the code base. See the NEWS for the release notes, and the CHANGES for the exhaustive commit list. BroControl has its own CHANGES.
Many thanks to everybody who helped us test the earlier beta version, much appreciated.