We now have the ability to mount the entire Refinery engine at a custom subdirectory:

mount Refinery::Core::Engine, :at => '/subdirectory'

However, this affects both the front-end and back-end. If you wanted to access the front-end at / but the back-end at /admin_panel, there's currently no way to do this. I think it would be a useful and important feature to be able to specify the Refinery back-end url, either from a config file, or in the routes.rb file. Maybe something like this:

mount Refinery::Frontend, :at => '/'
mount Refinery::Backend, :at => '/admin_panel'

I think this is even more important for non-english speaking users. /refinery might be ok for english speaking users, but I doubt that it's easy to remember for non-english speakers.