iPhone and BlackBerry browsers fall at Pwn2Own
Pwning the browser in the BlackBerry Torch 9800 proved a bit more difficult, but not because that particular piece of software was more secure. It just so happens that there's no debugger available for that version of the BlackBerry browser, so pwning it required combining two information leak bugs, an integer overflow bug, and a lot of trial and error work for the multinational team of researchers that decided to do this. Again, the only requirement for the exploit to work was that a specially-crafted website had to be visited. There is a newer firmware version for the Torch than that which was exploited, but the flaws are still there.
The Android-powered Google Nexus S and a Windows Phone 7 device were also supposed to be tested, but the researchers that had been chosen to do so did not show up.