POC iPhone hack

Aside from the rant and the usual "Apple is secure" backlash - an article on the Wired Blog ran recently about a proof of concept hack for the iPhone. This particular hack enabled the remote user to listen in, record from the microphone, read stored emails and even see calling history on the iPhone. While the particular vulnerability that was used to exploit the iPhone has already been patched by Apple - the tide is coming in for this device and it's only a matter of time before another un-patched exploit is used in the wild. So, which of your users has an iPhone?