OS Calling card
Net2phone
Net2phone (virtual) calling card works pretty well.
Local access in most US cities. USD$ 7.9 cents per minute to a landline in Oz.
http://web.net2phone.com/products/net2phonedirect/
Local access in most US cities. USD$ 7.9 cents per minute to a landline in Oz.
http://web.net2phone.com/products/net2phonedirect/