The details on this are still sketchy, we’ll probably never know what went on. But it appears that University of East Anglia Climate Research Unit has been hacked and many many files have been released by the hacker or person unknown.
UPDATE: Response from CRU in interview with another website, see end of this post.
Thanks much to Maria Celeste on Facebook for this one (didn't want to us entire name, blast to the world...). If it turns out to be true, WOW, it's going to be big.