Yet another plugin that allows groups to be added as watchers. This plugin aims to be very simple and does not require any additional views/menus/etc. After installing this plugin, your groups will show up in the normal watchers menus, and can be added as watchers for new issues both in the interface and API.
cd /path/to/redmine/plugins
git clone git@github.com:pstengel/redmine_groups_act_as_watchers.git
cd /path/to/redmine/plugins/redmine_groups_act_as_watchers
git pull