[VOIPSEC] VOIP for free??

[Kartik Trivedi]

Guys,

Just got this question from one of my friends...Any thoughts?

Just heard this, need to verify it. So you have companies like vonage and 
etc selling you VoIP phone with a local number. All you need is a internet 
broadband and a box then you got a US number. What is stopping someone ship 
this box to,say taiwan, and making int'l call paying local price($20 for 
unlimited call)? From my understanding, it is practically doable. Skype 
makes it free, but it doesn't give you a US phone number. So is there any 
security implication on this?

Thanks in advance!!