Interesting module which would be a simple alternative for building a micro services architecture on Node.js as compared to using a service bus or message queue.
Yeah, this is basically something along those lines.
I found that Node fit really well for this task.
I have been using Redis within Node.js lately to decouple my system with messages. I however can't block services once they have started although in my use-case I don't need to block. Your use-case sounds different so I can see how your module could be valuable for the purpose you built it for.