I'm reading it now. It looks like the IAEA report to the Japanese government, and it also looks like the presentation that one of the government's favorite nuclear scholars at Tokyo University made in late May (h/t helios).
Why do I get this suspicion that all three were written by the same set of people?
The most hilarious part of the report to me is the "lessons learned" section. Before they "learn the lessons", they'd better stop these reactors from spreading further radiation, FIRST.
The Japanese government report to the IAEA (in English):
http://www.kantei.go.jp/foreign/kan/topics/201106/iaea_houkokusho_e.html
The IAEA report to the Japanese government:
http://www.mofa.go.jp/mofaj/kinkyu_img/20110601_01.pdf
Professor Naoto Sekimura's presentation on May 26 to the US Academy of Sciences in Washington DC :
http://dels.nas.edu/resources/static-assets/nrsb/miscellaneous/SekimuraPresentation.pdf