I had a bunch of questions about why it had "Zero" in the name, and why should I use this instead of just building RPC on ØMQ (zeromq). Then I went to the Github page.
Currently using 0MQ to set up our cluster...handles concurrency, the guide has plenty of thorough examples (not to mention it's humorous, and it has examples in every mainstream language (C, C++, python, java, ruby, haskell, etc).
You should mention ØMQ on the front page!