From Levees.Org which Sarah did a post on last year here.

The nations' citizens and Louisiana deserve the 8/29 Investigation, a third-party independent analysis of the flood protection failures during Hurricane Katrina because:

* the official levee investigation, the Intergency Performance Evaluation Task Force (IPET) was managed by the US Army Corps of Engineers, the same agency responsible for the flood protection's performance - a clear conflict of interest.
* two significant non-governmental levee analysis teams, the Independent Levee Investigation Team and Team- Louisiana have yielded results that conflict with the IPET in five (5) of seven (7) of the major levee failure mechanisms including the Industrial Canal breach.
* An ethics panel is currently underway to examine charges that the Corps of Engineers colluded with the American Society of Civil Engineers to hide the mistakes of the corps, to intimidate anyone who tried to intervene and to delay the results of the IPET until the public's attention had turned elsewhere. ASCE President Dave Mongan has promised that its final report will be made public.

The Times Picayune blog has an article from last November on the organization with a video made by high school students that was posted on YouTube and then taken down under legal pressure. There are interesting comments near the top with purported history of the levees and how they came to be built the way they did.