Dave Thomas' announcement on ruby-talk that the Pragmatic Programmers are about to publish a book on Erlang sparked some interesting back-chatter on the O'Reilly editors' list. But first, Dave's announcement: I love Ruby--I've done all my serious (and most of my not-so-serious) work in Ruby since 2000. But that doesn't mean that I think it's the only solution--the universal language. There are alw