I've been running Nginx + uWSGI for a long time but recently switched over to Nginx + Gunicorn for Gevent support, and so far it seems to be working well.
Gevent's monkey patching approach allowed me to convert a traditional blocking web app (built on Flask/SQLAlchemy) into an evented model without having to rewrite the entire app around an event-driven approach (ala Twisted or Tornado). All you have to do to get Gevent working with Gunicorn is to pass it a command line argument to use the Gevent worker instead of the default synchronous worker.
Gunicorn + Gevent also makes it quite easy to integrate WebSockets into your existing web app, which is something uWSGI doesn't handle very well yet.
All this is to say that though uWSGI is a very solid piece of software, Gunicorn is definitely a reasonable alternative to uWSGI depending on your use case.
gunicorn + meinheld is even better than gevent in my experience. meinheld is written in C and offers a monkey patch option, and is a little bit faster than gevent. i'm using it with flask + sqlalchemy + redis with great success.
Gevent's monkey patching approach allowed me to convert a traditional blocking web app (built on Flask/SQLAlchemy) into an evented model without having to rewrite the entire app around an event-driven approach (ala Twisted or Tornado). All you have to do to get Gevent working with Gunicorn is to pass it a command line argument to use the Gevent worker instead of the default synchronous worker.
Gunicorn + Gevent also makes it quite easy to integrate WebSockets into your existing web app, which is something uWSGI doesn't handle very well yet.
All this is to say that though uWSGI is a very solid piece of software, Gunicorn is definitely a reasonable alternative to uWSGI depending on your use case.