We recently learned about Jajah. This interesting service lets ordinary phones make cheap VoIP calls. The way it works is:

• You go to the Jajah Web site.
• You enter your (conventional) phone number and the phone number of the person you’re calling.
• Jajah calls your (conventional) phone.
• When you pick up, Jajah calls the person you want to talk to.

Rates are cheap. See here.

… David Ferris