I like Tornado, too, but here are a couple problems: - Hard to test, at least relative to Django. There's no built-in support, and being async makes it a littl

I like Tornado, too, but here are a couple problems: - Hard to test, at least relative to Django. There's no built-in support, and being async makes it a little complicated. I have it working now, but it took some bashing and plenty of the mock library. - Lack of libraries for things we might want to do asynchronously. I can buy the argument that that's fine for databases, but for AMQP it's mandatory. The lack of a (working) Tornado AMQP library drove me to use Cyclone, which is a production-ready port of Tornado to the Twisted framework. Libraries ahoy.