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Re:Facebook Chat Architecture (Erlang) by puzza007 on Monday December 13, 2010 @07:38AM (#2000250)
I'm not sure that would provide any advantages over Erlang. There's a nice discussion here:

http://erlang.2086793.n4.nabble.com/node-js-compared-to-erla...

Re:Facebook Chat Architecture (Erlang) by okaramian on Monday December 13, 2010 @02:04PM (#2001570)
There is also the issue of Facebook chat being rolled out in 2008, which I'm assuming Node.js didn't exist by. Node.js would need to provide a significant gain in order to justify refactoring that system.