Perhaps among the Erlang community but I only found out as a result of digging into the company.

Would be great to have someone from WhatsApp speak at CUFP this year [1]. If anyone reading this can encourage them to do so (or put me in touch with someone one there), that would be great.

[1] http://cufp.org/

The Snabb Switch* people have been talking about it a lot on HN, and there was a link to their github the other day.

*My understanding is that it's a similarly architected system, but built on a Linux/luajit stack