FYI, Simon Marlow is incredibly big in the Haskell community and is the leading expert in Multi core parallelism via STMs in Haskell. Some of the work he has done for the GHC compiler is frankly fantastic.<p>This is incredibly big news in the Haskell world. The FP community is starting to break boundaries with the industry in the last 5 years with Clojure (and Scala's functional support).<p>Currently, FB seems to use haskell only for basic lexing and parsing[1]. It would be tremendous to see them using it at FB scale. I think there's going to be gain for both parties - For FB, the publicity and hacker outreach, and Haskell - industrial reliability.<p>[1]: <a href="http://www.haskell.org/haskellwiki/Haskell_in_industry" rel="nofollow">http://www.haskell.org/haskellwiki/Haskell_in_industry</a>