Gawker has the story:

Apple has suffered another embarrassment. A security breach has exposed iPad owners including dozens of CEOs, military officials, and top politicians. They—and every other buyer of the wireless-enabled tablet—could be vulnerable to spam marketing and malicious hacking.

...

It doesn't stop there. According to the data we were given by the web security group that exploited vulnerabilities on the AT&T network, we believe 114,000 user accounts have been compromised, although it's possible that confidential information about every iPad 3G owner in the U.S. has been exposed. We contacted Apple for comment but have yet to hear back. We also reached out to AT&T for comment. A call to Rahm Emanuel's office at the White House has not be returned.

This could get interesting.