Comment by lightcatcher

Its relatively difficult to find maintained Mongrel2 Python libraries, but projects like http://wsgid.com/ , https://github.com/rfk/m2wsgi , and (maybe unmaintained) https://github.com/berry/Mongrel2-WSGI-Handler make it fairly easy to run WSGI apps behind Mongrel2.

I wouldn't use Brubeck without WSGI solely because I don't want to write an app dependent on its web server.