Save on Phone Calls

The eagle eye of David Passell found this info on how to turn an iPod Touch into an iPhone in the New York Times.  Columnist David Pogue describes Line2,  a $1 iPhone app, and how to make calls indoors and in other corners of the world where AT&T signal doesn't reach, send unlimited texting, and save $30 or $40 a month off your AT&T bill.  Since the article's posting on September 30 Mr. Pogue has replied to 245 questions and comments from readers.