[Freeswitch-users] Mod_whatsapp and mod_viber

We have tremendous amounts of users on whatsapp and viber these days. Maybe it's time to start interconnect with those communities. I can see many uses in my head. I will start some whatsapp to SIMPLE integration tests as whatsapp is xmpp based, does anyone have experience with the viber protocol and user management? Or maybe somebody has already implemented those?