I see it more as a competition to Rebtel or to Gizmo Call's free local numbers:
Jangl “Call Anyone.” With “Call Anyone” simply enter someone’s email address at Jangl’s homepage to get connected. You’ll be given a phone number – local to you – to call them. During the first call, you’ll leave a voicemail, which Jangl then delivers via email. Once they receive that message, the recipient receives instructions to get a number – local to them – to call you back. This service still keeps your personal number safe, enables text messaging via SMS2 and the easy exchange of voicemails, too. Plus, Jangl works on any phone – even if your phone doesn’t normally allow you to call international numbers.Doesn't this sound like Rebtel to you?
If you use this service right you don't have to make any international phone calls again. You can give free local numbers to all of your friends, whithout paying Rebtel's basic fee or bothering with Gizmo Call's numbers that are every time different and can disappear if you don't use them regularily.
I will directly check if I can get a Peruvian inbound number from Jangl so that my friends from Lima can call me for local prices. That's my favourite test for new inbound VoIP services.
What makes me courious is why GigaOM deleted my last comment on the new Jangle features. A technical error? Or did they get pressured by Jangle's CEO Michael Cerda, who also commented? Didn't they like what I had to say?
So I will just repeat it:
In times of VoIP every phone call can be free or a local call. No need for exaggerated per minute costs. The SIP standard has opened a Pandora's box for the telecommunications industry. People are tweaking given services, like Jangl, for their own purposes and establishing their own free networks. Voice is just another internet service like email and tends to be free. As I said: "Free calls are still the VoIP killer app to me".
As I see now Jangle does not offer German nor Peruvian numbers. So I cannot use it. Which limited phone number provider do they use? A clear disadvantage, compared to Rebtel or Gizmo Call.