GNU Free Call has been announced (Skype-like software)
The sad fact of the matter is most people do not give a hoot about software being open.I honestly do not think you stand a chance competing against Skype, it is so insanely great and wide spread. I'd be impressed if they can actually make the UI/UX better than the latest (horrendous) Skype client.It's like the Diaspora of VoIP.