Over the weekend, a now notorious group of hackers named Lulzsec, released the quarry from their latest hacking endeavor to the public. One of the released items, a leaked internal document from AT&T, was interpreted by the blog iFans to contain indications that AT&T will be testing an LTE-capable iPad as part of their coming LTE rollout.
It is important to note that the leaked document doesn't specifically mention the iPad 3, or an "LTE iPad". It does, however, include the iPad as a device that will be tested as part of the LTE rollout. The portion of the document in question is specifically related to LTE rollout and LTE testing, and the inclusion of the iPad in this list is what is being interpreted as a hint that the coming iPad 3 will support LTE.