It requires simplejson 2.0 or better.
easy_install -U TracBacklog
Enable the plugin in trac.ini.
[components] backlog.* = enabled
None. You will need to run trac-admin upgrade on your database though (it needs to create a table and some default values for your tickets).
Please use the GitHub site to file any bug and feature requests.
Download the tar'd source from https://github.com/jszakmeister/trac-backlog/downloads.
The plugin is maintained on GitHub.