The "privacy" (http://www.zonemessenger.com/privacy) and "terms" (http://www.zonemessenger.com/terms) should give you two static pdf's. On my side it's only the "about" link that is dead (will be my personal website). If "privacy"/"terms" really don't work on your side let me know!
As of now there is no commercial backing what so ever. It's mealy a side-project that finally got finished. And for now there is also monetizing scheme implemented.
It looks like a commercially backed app. What is the business model here? Paid access or advertising?