THIS IS AN INCREDIBLE EVENT.
I have been thinking about how VOIP would revolutionize the mobile communications world for years but I could always see the near impenatrable roadblock that is the eradication of corporate profits. Mobile provider '3/Three' in Aus offers a special partnership 'Skype' mobile phone with 2 hours of free Skype to Skype calling each day as long as you are within a 3G coverage zone and have an active SIM. However they realized that if they offered SkypeOut (calling landline and mobile numbers direct) this would kill the industry.
Now as mobile internet is becoming more accessible through wi-fi @ home, and hot-spots and with the development of powerful Mobile Internet Devices (MIDs) as well as not-for-profit 3rd party developers it seems as if this has finally come to fruition.
Interconnectivity is here folks.
note: current version is a little buggy but I highly recommend you install on iPhone as you can update versions through installer as they come available. Currently my Skype contacts aren't available when i logout and back into fring... and i can't get access to my phonebook through fring which is a bit of a pain in the A. But hell its a pre-release and I'm definitely not complaining.