Use your Ipod Touch as a phone

This free application allows you to make phone calls abroad with your cellphone at a cheaper cost. It is basically VOIP on your phone which is enabled by the application. You would be making the calls over the internet. This can also be used by the Ipod Touch and also the new G1 phones from Google. If you want to save on roaming cost and long distance charges, this is one way to go.
TRUPHONE