Today we published a small security bug present in the iPhone OS until version 2.1. The bug is small but has big impact in the way that it can be used to call arbitrary phone numbers from visiting a website.
More details including a video (but not full-disclosure) can be found here (German only): www.sit.fraunhofer.de/pressedownloads/pressemitteilungen/iPhoneHack.jsp
We will do a full-disclosure as soon as the update is out and people had time to install it. Details will be available here.