What you are talking about already exists using VoIP.
Skype to Skype is free. I'm not sure how this is much different, being software that both caller and recipient need to be running?
Skype can only call other skype users unless you pay.
Sounds like this can only call other BBM users period. And you (both?) have to be on wifi.
I couldn't care less about skype. I'm not interested in skype hogging my device with malware, and not interested in Microsoft and the govement recording my calls...The last shred of security that still exists out there lays in the Blackbarries.
Yeah my BBM communication would be super secure since there wouldn't be any...nobody I communicate with has oneAnd Skype was just an example, there are lots of voip and sip services out thereThe government spying situation sucks but I'm not vain enough to think the government cares at all what I am talking about on my phone