It was a little, tiny, tiny addendum at the end of a WSJ article, but it was there: in an interview with the WSJ, Steve Jobs confirmed that the suspected iPhone “kill switch” does indeed exist.  Of course, for investors, talk of the App Store downloads are probably more exciting, and Jobs detailed that as well:If sales stay at the current pace, Apple stands to reap at least $360 million a year in new revenue from the App Store, Mr. Jobs said. “This thing’s going to crest a half a billion, soon,” he added.