PS: I really don't see the issue. Not every software come as a deb package (web2py, hello!). Roberto is very active on this and on other wsgi-related lists, and helped practically everybody with their setup.
What are 4 easy steps to install and forget about uwsgi updates ? Anyway, I switched from ubuntu/debian-based madness (/etc/uwsgi/apps-available? unreadable /etc/init.d/wsgi, etc!! ) to the emperor mode one or two months later it was available for uwsgi (took 6 steps at that time, didn't have Roberto at hand at that moment :P).... I live happily with nginx+uwsgi (just because I need to serve a lot of static files + php pages + web2py applications, else I would have ditched nginx alltogether)....After all, I choose nginx also for configuration semplicity over apache, and uwsgi in emperor mode is really something you shouldn't miss. Scrambling ubuntu versions just to have "the latest one" seems pointless to me: either you need some software that runs only on the newest ubuntu version or you don't upgrade. If things works, why the need to change? BTW: ubuntu 12.10 is not an LTS and it's very early to say that it's a battle-tested version for production: I'm not saying you should expect breakage, but it's not uncommon if you're on the first ones who test it . --

