VOIP for iPod Touch (SIP-VOIP)
An App called SIP-VOIP is a VOIP software available on jailbroken iPod Touches and the iPhone. Unlike other VOIP applications it has been confirmed to work on both of Apple’s Devices.
Their plan was to make a VOIP compatible with the iPod Touch to bring an iPhone like experience to users without access to the iPhone. Check it out and tell us what you think in the comments.
via http://www.apple-touch.com/voip-for-ipod-touch-sip-voip-21609.php