SIPtap and tapping phone calls
(http://blog.tmcnet.com/blog/rich-tehrani/voip/the-latest-voip-security-threat.html)"Called SIPtap, the software is able to monitor multiple Voice-over-IP (VoIP) call streams, listening in and recording them for remote inspection as .wav files.” - PC World
Unlike what others may say, this is not exactly the latest threat. When traffic is not encrypted, it can be recorded by anyone in between and later on replayed; and that includes VoIP. In fact several tools have been available for a while which are able to do the same thing that SIPtap (which is not publicly available for download) does. Examples:
Anyways, what the author of the tool does well is deliver the message (and market himself). He explains the threat quite well on his youtube video in a way that is probably reachable to people who are more .. technically challenged.
Found a similar post to mine at Mr. Blog