I'm playing with Erlang right now and I really enjoy it, but being it so different than usual imperative and OOP that are now widely accepted anywhere I fear it may be difficult to adopt it in some context (even when it's the perfect tool for the context). I'd like to hear your opinion about that.

Are you using Erlang for any significant project at work? What kind of system are you building? Was it difficult to persuade your boss/company to allow you to use that? Did you have any difficulty because of the choice you made (e.g. staffing skilled people, needing more time to build the skills your team needs)?