Is this project still maintained? I don't see any commits since 2013. I saw a demo of this when I used to work at TW and gave it a shot and it worked like a charm. Unfortunately, I couldn't find any rspec3 runners!
I am not sure, maybe it is just done and they don't have any major bugs? I do know the recently open sourced go.cd continuous deployment software is planning on integrating TLB so maybe they will take over maintenance if needed.