I am not big or even production but unscathed.com is built on it. Development has been active and the project is well maintained and judging by the group it is

I am not big or even production but unscathed.com is built on it. Development has been active and the project is well maintained and judging by the group it is gaining momentum. Bit.ly appears to be using it. They even have a module they released for using tornado and mongodb. https://github.com/bitly/asyncmongo https://github.com/bitly/asyncmongo