Visit this thread and scroll down to number 13. Gavin Schmidt--a fairly reliable source on the matter--says that his information is that the files were not leaked but taken by a black-hat hack of the backup mailserver.
In other words, not a leak, let alone the "whistleblower" fairytale that emerged in the denialosphere.
Hmm...if anyone did that to Morano, Michaels, and Macintyre, we'd probably learn who was responsible. Not that I advocate black-hat hacking or anything!