Python, "you don't have permission to access that port" [closed]
Ports lower than 1024 require privileges. sudo python manage.py runserver .0.0.0.0:80 should do the trick... but if you've got a LAMP stack running on port 80 they won't be able to coexist.
sudo netstat -nlp will tell you what processes have which ports open. It should reveal what's on 8080 already.