The uWSGI project solved that "issue" (really, i have difficults calling it an issue, but i can understand the point of passenger guys) with the "uWSGI Emperor" more than one year ago in a pretty elegant (and system-friendly) way. You may want to look at it.
Yup! I already use it - I have templated config files so I just create a symbolic link when creating a new Django app.
I didn't have to configure Emperor mode on my new Ubuntu machine - it has a directory where configs are stored. I remember 8 or 10 months ago, you had to configure emperor mode and set the "vassals" directory, not anymore I guess.