What turned into a pretty frenzied rumor this afternoon ended up being much ado about nothing, but there is something noteworthy. As the story goes, TechCrunch reported that Microsoft was going to completely replace Google with Bing as the search engine of choice for the iPhone once OS 4 launches next month. Enter All Things Digital's Kara Swisher, who has a pretty strong track record on all things Redmond. According to her sources, what's being discussed isn't a full swap -- instead, Bing is being considered for an "option" that users can decide
