[1] http://www.quora.com/Has-Quora-made-any-modifications-to-Tor...
[2] http://www.quora.com/How-does-Quora-use-Tornado
For the entire site or only some parts ?
just curious.
Bit.ly appears to be using it. They even have a module they released for using tornado and mongodb. https://github.com/bitly/asyncmongo
ImEveryone (my own site) uses it to, but we're not quite bitly sized.