Haxl is the only team using Haskell in prod, so the team itself isn't all that large. With the traction we gain, though, we could grow.

Is Bryan O'Sullivan and the team from his Haskell-based startup Facebook acquired in 2011 still there? I sat in on a class of his a while back and remember him ruefully laughing about having to use PHP now.

Bryan is still here. He's actually kicking off a Haskell class within Facebook at the moment - https://twitter.com/bos31337/status/475335956556705792

Great! He's obviously a great advocate for Haskell at Facebook.

The blog post - https://code.facebook.com/posts/302060973291128/open-sourcin... - describes the initial usage - to assist the Sigma system in answering questions like "Is this content spam?".

Some background on that system, including the FXL component that Haxl replaces, is here: http://research.microsoft.com/en-us/projects/ldg/a10-stein.p...