-How can I trust this code?
-Well, you can just read the contract, it's open source.
-But I'm not a coder!
This is a common dialog, and it's true. While it's easy to say that anyone could read any contract, most people will be just trusting that someone has read the code and understood it. One nice way that a client could help anyone audit the code would be if there was a tool to convert code into a flowchart, like this:http://code2flow.com
Just an idea..