Speaking with the Wall Street Journal, Verizon COO Lowell McAdam has confirmed that the company will offer a $30 unlimited data plan for iPhone users. “I’m not going to shoot myself in the foot,” McAdam said, referring to the large number of AT&T iPhone users who were grandfathered in with unlimited data prior to AT&T’s move to a tiered data pricing scheme last year. The report also notes that anticipation of a Verizon iPhone launch…