With Firmware v1.1.1, Apple aimed to do more than prevent users from accessing other networks: they were trying to fix critical security holes. While their efforts did work temporarily, hackers recently are proclaiming that they are cracking those security measures. Hackers claim that a special TIFF file can cause a buffer overflow error in Mobile Safari, rendering the iPhone itself vulnerable. While these hacks are nowhere near as easy to use as what was happening in previous versions of firmware, it's definitely a start. There is no word as to when firmware v1.1.1 will be hacked to the point where alternative networks are available for the iPhone.