I am anxiously waiting for an easy to use & secure Skype replacement.
As I understand it Keyhotee has almost got distributed identity ownership working in a blockchain, but it doesnt have any VOIP implemented yet. Why not just integrate/fork the code from Tox? Their user interface looks really good, but Im guessing they have a centralized username registration scheme.
Too many open source projects try to reinvent the wheel, when they could be leveraging other people's work.