Various blogs are reporting that it appears some iTunes customer accounts have been hacked and that funds from those accounts may have been used to purchase apps in the iTunes App Store.
Earlier Sunday, Engadget reported an inexplicable uptick in sales of book apps by a developer identified as Thuat Nguyen. According to the blog, at the time of writing its report, Nguyen apps accounted for 42 of the top 50 books by revenue in the Books section of the iTunes App Store. Engadget went on to mention "a number of people reporting up to hundreds of dollars being spent unwillingly from their [iTunes] account to these specific books."
Blog TNW Apple reported that the phenomenon appeared to extend beyond apps by one developer, and that it seemed to be international in scope. It also ran excerpts from several posts to the MacRumors: Forums Web site.