Hacking group AntiSec has acquired millions of of UDIDs allegedly collected without permission by the FBI. The group claims it got into an FBI agent's laptop to get the data, which contains 12 million unique identifiers tied to iPads, iPhones, and iPods.
AntiSec has so far released a million UDIDs online, but cut out other potentially identifiying information, just to let users see if they're among the compromised. The FBI, for its part, has vaguely denied involvement in the situation, claiming there's "no evidence" to implicate it.
If you were among those put at risk by the FBI/Elite Hackers/Illuminati and subsequent breach, then all you can really do is change any shared passwords and feel violated.