A report that's making the rounds out of the UK say that an insecurity expert has hacked SIP based VoIP calls.
If true this will give IT managers fits, and if not addressed by the SIP standards folks at the IETF very soon, will have a chilling affect on the growth of IP based telephony world, first and foremost in the enterprise space that Microsoft is chasing with its SIP based Live Communications and Unified Communications efforts.
Given how much news gets generated around bugs and exploits in MSFT Windows OS' this will give the market audiences a field day with their voice products.
It also means that networks like Vonage, that don't currently have a very aggressive security operations compared to AT&T's CallVantage group, and other small operators (i.e. Broadvoice, Earthlink, VoicePulse, Lingo, SipPhone, etc.) may have to beef up their security and begin to look seriously at this issue.
Nothing would be worse than having the wrong person here the wrong thing....
Can you spell VPN....and would that even help?
UPDATE--> Mr. Blog has a very informed perspective..and I admit, I'm not an expert on hacking or security. I just know its something we should know about.