Recently started to dive into FP and Haskell, and it's nice to see it used at this scale.<p>If anyone is looking for a starting-point: I stumbled upon a great book: <a href="http://haskellbook.com/" rel="nofollow">http://haskellbook.com/</a>
It's still early-access, but the biggest part is done and it's already at 1000+ pages.<p>(I'm not affiliated with this project in any way)
I'm really excited about this.
If facebook is able to use it in production, then Haskell is no longer an academic language. I would tell my boss that we can use Haskell because facebook is using it:)<p>BTW, the stackage project have resolved a big problem (Cabel hell) in Haskell ecosystem, and I start to use haskell again.