This is a nice surprise. It applies to wired (60 mins) and wireless customers starting 3/11 to 3/31.
Via Engadget: AT&T Makes Calling Japan Free Until End Of March
I just looked on the AT&T page and can’t find any info on it.
Update 2: Found AT&T’s page and Verizon’s. Not Sprint’s though.
Update 3: T-Mobile has waived fees too. I imagine everyone has at this point.