You won't use it until the code is refactored? If it works, who cares if it is a mess and was written by a "beginner".
However, I've often been amazed at how "messy" code is. Code that does what it needs to, and works. Early bird get's the worm, and I applaud this guy for throwing something out (something perhaps that we were too busy taking our time "working on to get clean and perfect"). I'm sure it'll get refined and refactored as time goes by, if people latch on.
Many have been burned by PHP experts before. This guy is a beginner. I really like the app design and idea but I can't find a reason to let protect my data or compromise my server. Might be cute to host it inside my firewall, though.
That would be the question. Is it bugfree, or will it eat my data and let scriptkiddies run amok on my host?