Planning on selling licenses I suppose? I would have loved to have a poke around in the erlang server code. Cowboy/rabbit/messaging - sounds fun.
As I said in comments above, if the source is really important to you, I can walk you through it and give you access so that you feel comfortable about what you're adopting. We're just not ready to open source the server yet.
You don't even need to pay for a server license until you're doing thousands of messages per second! At those scales, you should be able to afford cheap licenses. We're not focused on making small amounts of money from ramen startups or hungry students. We do have a good business in enterprise software to fund the free Bridge Cloud servers.
[1]: darshan@getbridge.com
No offence to you, but I have sen too many companies go bankcrupt, or get bought out and shut down, to trust such important infrastructure to you!